BMW Internal Engine Parts for BMW E30 M3 S14 2.3L

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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Supertech 7mm Intake Valve Stem Seal - Polyacrylic - BMW S14 S38 ...
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Supertech - Corporate Logo
T#:641013
Part#: VS-VW7I
Ships in 4 Business Days
$ 0.99 USD
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Looking to replace your valve stem seals due to leaks, cracks, splits, or even during an upgrade of your camshafts, valve springs, or valves? Supertech valve stem seals are the way to go! This cheap but effective seal replaces the stock BMW seals that are notoriously prone to issues due to heat cycles and chemicals which cause the seals to become weak and brittle. Supertech seals offer a significantly longer life span and are resistant to both heat and chemicals thanks to their use of Viton or Polyacrylic construction (dependant on valve type). That means less time in the garage and more time on the street or track! These seals are also great for anyone who is looking to upgrade to dual valve springs thanks to the seal's overall thinner outer diameter! Guide OD: 9.8mm/.385" Seal OD: 13.2mm/.520"
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Intake Valve - Priced Each
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Genuine BMW - Corporate Logo
T#:367629
Part#: 11341309343
Ships in 9 Business Days
4% off MSRP $ 159.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 153.99 USD
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4% off MSRP
$ 159.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 153.99 USD
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VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 6)
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Supertech - Corporate Logo
T#:35795475
Part#: VS-VW7E-6
Ships in 5 Business Days
$ 7.99 USD
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King Performance Rod Bearing Set - Standard Size
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King - Corporate Logo
T#:2393424
Part#: CR4596XP
Ships in 6 Business Days
$ 190.00 USD
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VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 8)
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Supertech - Corporate Logo
T#:35795474
Part#: VS-VW7E-8
Ships in 8 Business Days
$ 9.99 USD
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VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 10)
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Supertech - Corporate Logo
T#:35795473
Part#: VS-VW7E-10
Ships in 8 Business Days
$ 12.99 USD
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VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 12)
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Supertech - Corporate Logo
T#:35795472
Part#: VS-VW7E-12
Ships in 8 Business Days
$ 13.99 USD
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Valve Seal Set (pack of 8) - E30 M3
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Victor Reinz - Corporate Logo
T#:282
Part#: 11349059171
Ships on Jul 21, 2026
$ 15.99 USD
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E30 M3 Valve Seal Set (package of 8). If you drive a European vehicle, chances are high your vehicle came equipped with one or more Victor Reinz gaskets. Choose OE quality VR gaskets and seals and do the job right the first time.
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Wiseco Forged Piston & Ring - E30 M3 2.3 liter - 3.720 inch bore (94....
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Wiseco - Corporate Logo
T#:2380
Part#: TEN300623S
Special Order: No Guaranteed ETA
$ 726.99 USD
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$ 726.99 USD
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Wiseco BMW E30 M3 Piston set - 3.720" bore. Wiseco leads the performance aftermarket by producing the highest quality forged pistons. Extreme racing conditions demand the strength and toughness that only forged pistons can offer. Compared to cast pistons, forgings are tougher and more durable and will stand up to the abuse that high-performance motorsport applications require. Each set comes with rings, wrist pins, and clips. Born over 80 years ago from the passion for racing, Wiseco is a world leader in manufacturing high-performance, forged pistons for the motorcycle, automotive, ATV, snowmobile, personal watercraft, and outboard marine markets. The Wiseco crew shares the same level of dedication to motorsports as their customers and are focused on continually refining the quality and practices it takes to exceed expectations. Engineered, forged, and machined on cutting-edge equipment in the U.S. at Wiseco’s Mentor, Ohio manufacturing facility, Wiseco pistons are the undisputed leader in quality and performance. Wiseco Performance Products, built for racers, by racers. Bore Diameter - 94.50 Compression Height - 32.00 Forging Type - Full Round Oil Ring Thickness2.8 Piston Material - 2618 Piston Pin Included - Yes Piston Pin Material - 9310 Piston Volume - -32.00 Product Series - European Product Types - Piston Kits Ringset Included - Yes Second Compression Ring Thickness - 1.2 Skirt Coating - Y Top Compression Ring Thickness - 1.0 Wrist Pin Diameter - 0.866 Wrist Pin Style - Floating This item fits the following BMWs: 1988-1991 E30 BMW M3 2.3 liter
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ACL Race Series High Performance Connecting Rod Bearing Set - Oversiz...
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ACL - Corporate Logo
T#:48677225
Part#: 4B1568H-.25
Special Order: No Guaranteed ETA
New Item
$ 118.99 USD
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Introducing the BMW S14B20, S14B23, and S14B25 Race Series High-Performance Con Rod Bearing Set by Automotive Components Limited. Elevate your BMW's performance with these precision-engineered con rod bearings, specifically designed for performance BMW engines.
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BMW S14 4 Zyl. 4 Vent.
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Schrick - Corporate Logo
T#:554295
Part#: 0227D1920-05
Special Order: No Guaranteed ETA
$ 1,403.99 USD
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$ 1,403.99 USD
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Schrick has been dedicated to engine performance through the development of only the highest-quality camshafts for more than 40 years. They've created a bond with BMW enthusiasts nearly the entire time, offering options for both the street and track using top materials for strength and accuracy. Schrick has grown into a technology center offering one of the most advanced locations for engine testing and manufacturing. These are the same cams used by many high-end German tuners who are achieving sizeable gains with the S14 engine. For the power-hungry, these cams are a great way to achieve a linear increase in horsepower from mid-range, up to redline. Duration Intake - 292 Duration Intake @ 1mm - 262 Duration Exhaust - 292 Duration Exhaust @ 1mm - 262 Intake Peak Timing - 102 Exhaust Peak Timing - 102 Cam Lobe Lift Intake - 12 Cam Lobe Lift Exhaust - 12 Valve Lift w/o Valve Clearance Intake - 12 Valve Lift w/o Valve Clearance Exhaust - 12 Valve Clearance Intake - 0, 25 Valve Clearance Exhaust - 0,3
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BMW S14 4 Zyl. 4 Vent.
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Schrick - Corporate Logo
T#:26638236
Part#: 0227D1760-01
Special Order: No Guaranteed ETA
$ 1,403.99 USD
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Schrick has been dedicated to engine performance through the development of only the highest-quality camshafts for more than 40 years. They've created a bond with BMW enthusiasts nearly the entire time, offering options for both the street and track using top materials for strength and accuracy. Schrick has grown into a technology center offering one of the most advanced locations for engine testing and manufacturing. These are the same cams used by many high-end German tuners who are achieving sizeable gains with the S14 engine. For the power-hungry, these cams are a great way to achieve a linear increase in horsepower from mid-range, up to redline. Duration Intake - 276 Duration Intake @ 1mm - 245 Duration Exhaust - 276 Duration Exhaust @ 1mm - 245 Intake Peak Timing - 106 Exhaust Peak Timing - 106 Cam Lobe Lift Intake - 11, 3 Cam Lobe Lift Exhaust - 11, 3 Valve Lift w/o Valve Clearance Intake - 11, 3 Valve Lift w/o Valve Clearance Exhaust - 11, 3 Valve Clearance Intake - 0, 35 Valve Clearance Exhaust - 0,4
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BMW S14 4 Zyl. 4 Vent.
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Schrick - Corporate Logo
T#:599280
Part#: 0227D1200-02
Special Order: No Guaranteed ETA
$ 1,619.99 USD
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$ 1,619.99 USD
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Schrick has been dedicated to engine performance through the development of only the highest-quality camshafts for more than 40 years. They've created a bond with BMW enthusiasts nearly the entire time, offering options for both the street and track using top materials for strength and accuracy. Schrick has grown into a technology center offering one of the most advanced locations for engine testing and manufacturing. These are the same cams used by many high-end German tuners who are achieving sizeable gains with the S14 engine. For the power-hungry, these cams are a great way to achieve a linear increase in horsepower from mid-range, up to redline. Duration Intake - 320 Duration Intake @ 1mm - Duration Exhaust - 320 Duration Exhaust @ 1mm - Intake Peak Timing - 102 Exhaust Peak Timing - 102 Cam Lobe Lift Intake - 13 Cam Lobe Lift Exhaust - 13 Valve Lift w/o Valve Clearance Intake - 13 Valve Lift w/o Valve Clearance Exhaust - 13 Valve Clearance Intake - 0, 25 Valve Clearance Exhaust - 0,3
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BMW S14 4 Zyl. 4 Vent.
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Schrick - Corporate Logo
T#:26638235
Part#: 0227D1080-01
Special Order: No Guaranteed ETA
$ 1,619.99 USD
Free Shipping on orders $49 and up
Schrick has been dedicated to engine performance through the development of only the highest-quality camshafts for more than 40 years. They've created a bond with BMW enthusiasts nearly the entire time, offering options for both the street and track using top materials for strength and accuracy. Schrick has grown into a technology center offering one of the most advanced locations for engine testing and manufacturing. These are the same cams used by many high-end German tuners who are achieving sizeable gains with the S14 engine. For the power-hungry, these cams are a great way to achieve a linear increase in horsepower from mid-range, up to redline. Duration Intake - 308 Duration Intake @ 1mm - 277 Duration Exhaust - 308 Duration Exhaust @ 1mm - 277 Intake Peak Timing - 102 Exhaust Peak Timing - 102 Cam Lobe Lift Intake - 12, 2 Cam Lobe Lift Exhaust - 12, 2 Valve Lift w/o Valve Clearance Intake - 12, 2 Valve Lift w/o Valve Clearance Exhaust - 12, 2 Valve Clearance Intake - 0, 25 Valve Clearance Exhaust - 0,3
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WPC-Treated Performance Rod Bearing Service Kit - E30 M3 S14 ...
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Packaged by Turner - Corporate Logo
T#:36066227
Part#: 11241310515KT2
Ships on Dec 24, 2026
Sale - Save 16% $ 769.99

This product was last offered at the strikethrough price on
05-03-2026

$ 648.65 USD
Free Shipping on orders $49 and up
Sale - Save 16%
$ 769.99

This product was last offered at the strikethrough price on
05-03-2026

$ 648.65 USD
Free Shipping on orders $49 and up

If you're the proud owner of an S14-equipped, chances are you're passionate about enhancing your vehicle's performance and longevity. One crucial upgrade that can significantly improve your driving experience is Turner Motorsport's WPC Rod Bearing Replacement Kit, designed for enhanced durability and wear protection. Prevent costly mechanical failures and increase engine life with our WPC-Treated Performance Rod Bearing Service Kit!

Enhanced Durability: The WPC Performance Rod Bearing Replacement Kit is designed with superior materials and manufacturing processes. WPC treatment reinforces the surface of the bearings, making them highly resistant to wear, which is essential for aging engines like the S14. This durability ensures your engine will stand the test of time, even under strenuous driving conditions. Improved Performance: By reducing friction and wear, WPC-treated rod bearings allow for smoother and more efficient engine operation. This translates into increased power and responsiveness, providing you with a more exhilarating driving experience. Whether you're tearing up the track or enjoying a spirited weekend drive, you'll notice a difference in your vehicle's performance. Preventative Maintenance: Proactively replacing your rod bearings and bolts with the WPC Performance Kit can prevent potential engine failures. As engines age and accumulate miles, wear and tear become inevitable. These components help you address this issue head-on, preventing costly engine damage and repairs down the road. This is especially crucial for BMW E30 M3 owners who value their investment. Long-Term Cost Savings: While the initial investment in a WPC Performance Rod Bearing Replacement Kit may seem substantial, it's a small price to pay for the long-term benefits. Preventing engine failure and costly repairs can save you thousands of dollars over the life of your vehicle, not to mention the peace of mind that comes with knowing your BMW is built for reliability. Included in the kit:

8 - Turner Motorsport WPC-Treated "Race Series" Rod Bearing Shells 1 - Oil Pan Gasket 1 - Oil Filter Kit 1 - Oil Drain Plug 8 - Genuine BMW Connecting Rod Bolts 1 - Liqui Moly 10w-40 Engine Oil - 5 Liters 1 - Liqui Moly 10w-40 Engine Oil - 1 Liters 1 - Assembly Lube - 4 oz

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JE Pistons BMW S14B23
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JE Piston - Corporate Logo
T#:33846569
Part#: 312385
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$ 899.99 USD
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JE Pistons 13:1 Compression Piston Kit - BMW S14B32 Engine

Looking to push your BMW S14B32 engine to its peak performance? The JE Pistons 13:1 Compression Kit is engineered for high-revving, naturally aspirated engines, delivering the kind of power and precision that serious tuners demand. Built with JE Pistons' advanced forging technology, this kit ensures maximum strength without added weight—giving you both performance and reliability under extreme conditions.

Features:

  • 13:1 Compression Ratio: This high-compression setup optimizes cylinder pressure, resulting in more power, better torque, and improved throttle response.
  • Forged for Strength: Made from 2618 aluminum, these pistons are forged to provide superior strength and thermal efficiency, ideal for engines that operate at high RPMs or under significant load.
  • Precision Engineered: Designed specifically for the BMW S14B32 engine, ensuring a seamless fit and optimized combustion chamber dynamics for a perfect blend of power and reliability.
  • Reduced Friction: Low-friction skirt coating to reduce wear and maximize engine life, even under the harshest racing conditions.
  • Complete Kit: Includes four pistons, premium rings, wrist pins, and locks for a full installation package.
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JE Pistons BMW E30 M3
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JE Piston - Corporate Logo
T#:33846573
Part#: 321360
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$ 899.99 USD
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E Pistons 8.5:1 Piston Kit - BMW S14B23 Engine (Set of 4)

Unleash the full potential of your BMW S14B23 engine with the JE Pistons 8.5:1 Compression Kit, engineered for maximum strength and reliability in forced induction builds. Perfect for turbocharged or supercharged applications, these pistons are designed to handle high boost levels, ensuring your engine can withstand extreme pressures while delivering smooth, consistent performance.

Key Benefits:

  • Optimized Compression (8.5:1): Lower compression ratio designed specifically for turbo or supercharged setups, helping manage cylinder pressures for greater tuning flexibility and boost potential.
  • Forged for Toughness: Crafted from 2618 aluminum alloy, these pistons are forged to withstand extreme stress and temperature, making them ideal for high-boost, high-revving engines.
  • Thermal Efficiency & Durability: Enhanced heat dissipation design reduces the risk of detonation, allowing your engine to run cooler under heavy load.
  • Friction-Reducing Skirt Coating: Helps to reduce wear, improving the longevity of both the pistons and the engine, even under intense driving conditions.
  • Complete Installation Kit: Comes with four pistons, rings, wrist pins, and locks, providing everything you need for a smooth installation process.

Why Choose JE Pistons?

JE Pistons are a trusted name in motorsport for delivering unbeatable strength and performance. This 8.5:1 piston kit allows you to push your BMW S14B23 engine to new limits with confidence, whether it’s for track use, drag racing, or a high-performance street build.

Applications:

  • Fits BMW S14B23 Engines (E30 M3, high-performance builds)
  • Ideal for turbocharged or supercharged configurations.

Technical Specifications:

  • Compression Ratio: 8.5:1 for optimal forced induction performance.
  • Material: Forged 2618 aluminum alloy for unmatched strength.
  • Bore Sizes: Customizable options for overbore requirements.
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Genuine BMW Cam Follower - E28 M5 E34 M5 E30 M3
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Genuine BMW - Corporate Logo
T#:34345
Part#: 11341308158
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$ 131.99 USD
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$ 131.99 USD
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Genuine BMW Cam Follower
This item fits the following BMW Chassis:
E30 M3,E34 M5,E30,E34

Fits BMW Engines including:
S14,S38


JE Pistons BMW E30 M3
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JE Piston - Corporate Logo
T#:33846575
Part#: 321363
Back Ordered
$ 899.99 USD
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JE Pistons BMW S14B20 13.0:1 Compression Piston Kit - Set of 4

Unlock your BMW S14B20 engine’s true potential with the JE Pistons 13.0:1 High-Compression Piston Kit. Specifically engineered for naturally aspirated performance, these pistons are designed to deliver higher power output, sharper throttle response, and greater engine efficiency, making them perfect for track-focused builds or high-revving street machines. Built from high-strength, lightweight forged aluminum, these pistons offer the durability and precision needed to withstand the extreme demands of motorsport applications.

Key Benefits:

  • 13.0:1 Compression Ratio: Elevate engine performance with a higher compression ratio that optimizes cylinder pressure for maximum power, torque, and acceleration in naturally aspirated setups.
  • Forged for Strength and Lightness: Constructed from 2618 forged aluminum alloy, these pistons provide the ideal balance of strength and weight, ensuring maximum durability without sacrificing engine speed.
  • Efficient Combustion Design: Piston crown engineered to enhance combustion chamber dynamics, promoting cleaner, more efficient fuel burn while preventing detonation at high RPMs.
  • Low-Friction Skirt Coating: Coated piston skirts reduce friction during operation, extending the life of your pistons and improving overall engine performance.
  • Complete Installation Package: Includes four forged pistons, rings, wrist pins, and locks—everything you need to take your S14B20 engine to the next level.

Performance & Precision:

With JE Pistons, you get race-proven reliability and cutting-edge engineering. The 13.0:1 compression ratio boosts performance without compromising on durability, ensuring your BMW S14B20 engine delivers consistent, high-level power in any driving situation.

Application:

  • Fits BMW S14B20 Engines (perfect for high-performance street or track builds).
  • Ideal for naturally aspirated setups focused on maximizing power and efficiency.

Technical Specs:

  • Compression Ratio: 13.0:1, optimized for naturally aspirated engines.
  • Material: Forged 2618 aluminum for superior strength and heat resistance.
  • Bore Sizes: Custom bore sizes available, including overbore options.
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JE Pistons BMW S14B32 E30 M3
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JE Piston - Corporate Logo
T#:33846570
Part#: 312386
Back Ordered
$ 899.99 USD
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Here’s an alternative description for the JE Pistons BMW S14B32 13:1 Piston Kit (Set of 4), with a different tone and emphasis:


JE Pistons 13:1 Compression Piston Kit - BMW S14B32 Engine

Looking to push your BMW S14B32 engine to its peak performance? The JE Pistons 13:1 Compression Kit is engineered for high-revving, naturally aspirated engines, delivering the kind of power and precision that serious tuners demand. Built with JE Pistons' advanced forging technology, this kit ensures maximum strength without added weight—giving you both performance and reliability under extreme conditions.

Features:

  • 13:1 Compression Ratio: This high-compression setup optimizes cylinder pressure, resulting in more power, better torque, and improved throttle response.
  • Forged for Strength: Made from 2618 aluminum, these pistons are forged to provide superior strength and thermal efficiency, ideal for engines that operate at high RPMs or under significant load.
  • Precision Engineered: Designed specifically for the BMW S14B32 engine, ensuring a seamless fit and optimized combustion chamber dynamics for a perfect blend of power and reliability.
  • Reduced Friction: Low-friction skirt coating to reduce wear and maximize engine life, even under the harshest racing conditions.
  • Complete Kit: Includes four pistons, premium rings, wrist pins, and locks for a full installation package.

Why Choose JE Pistons?

JE Pistons are trusted in the racing world for their performance and reliability. The unique design of this 13:1 compression kit pushes the boundaries of power without sacrificing durability, making it a top choice for those serious about upgrading their BMW’s engine.

Application:

  • Fits BMW S14B32 Engines – E30 M3, race-prepped builds, and high-performance street applications.
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JE Pistons BMW E30 M3
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JE Piston - Corporate Logo
T#:33846572
Part#: 321359
Back Ordered
$ 899.99 USD
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E Pistons 8.5:1 Piston Kit - BMW S14B23 Engine (Set of 4)

Unleash the full potential of your BMW S14B23 engine with the JE Pistons 8.5:1 Compression Kit, engineered for maximum strength and reliability in forced induction builds. Perfect for turbocharged or supercharged applications, these pistons are designed to handle high boost levels, ensuring your engine can withstand extreme pressures while delivering smooth, consistent performance.

Key Benefits:

  • Optimized Compression (8.5:1): Lower compression ratio designed specifically for turbo or supercharged setups, helping manage cylinder pressures for greater tuning flexibility and boost potential.
  • Forged for Toughness: Crafted from 2618 aluminum alloy, these pistons are forged to withstand extreme stress and temperature, making them ideal for high-boost, high-revving engines.
  • Thermal Efficiency & Durability: Enhanced heat dissipation design reduces the risk of detonation, allowing your engine to run cooler under heavy load.
  • Friction-Reducing Skirt Coating: Helps to reduce wear, improving the longevity of both the pistons and the engine, even under intense driving conditions.
  • Complete Installation Kit: Comes with four pistons, rings, wrist pins, and locks, providing everything you need for a smooth installation process.

Why Choose JE Pistons?

JE Pistons are a trusted name in motorsport for delivering unbeatable strength and performance. This 8.5:1 piston kit allows you to push your BMW S14B23 engine to new limits with confidence, whether it’s for track use, drag racing, or a high-performance street build.

Applications:

  • Fits BMW S14B23 Engines (E30 M3, high-performance builds)
  • Ideal for turbocharged or supercharged configurations.

Technical Specifications:

  • Compression Ratio: 8.5:1 for optimal forced induction performance.
  • Material: Forged 2618 aluminum alloy for unmatched strength.
  • Bore Sizes: Customizable options for overbore requirements.
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JE Pistons BMW E30 M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
JE Piston - Corporate Logo
T#:33846574
Part#: 321362
Back Ordered
$ 899.99 USD
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JE Pistons 13.0:1 High-Compression Piston Kit - BMW S14B23 (Set of 4)

Unleash the full potential of your BMW S14B23 engine with the JE Pistons 13.0:1 Compression Piston Kit. Specifically designed for naturally aspirated applications, this high-compression setup boosts power, responsiveness, and efficiency, making it the ideal choice for race-focused builds or high-performance street engines. Built using JE Pistons' cutting-edge forging process, these pistons deliver unmatched strength and precision for your BMW engine.

Key Highlights:

  • 13.0:1 Compression Ratio: Optimized for maximum horsepower and torque in naturally aspirated engines, this high-compression setup elevates performance and throttle response, perfect for high-RPM environments.
  • Premium Forged Design: Manufactured from 2618 forged aluminum, these pistons are engineered for extreme durability and lightweight performance. Capable of withstanding high stress and temperatures, they offer reliability even under intense racing conditions.
  • Superior Combustion Efficiency: The piston dome is designed to optimize combustion chamber dynamics, promoting a clean burn and reducing the chance of detonation, while enhancing power output.
  • Friction-Reducing Coating: Skirt coating minimizes friction and wear, providing smoother operation and extending the lifespan of both the pistons and the engine.
  • Complete Set: Comes with four pistons, high-performance rings, wrist pins, and locks for a full installation package, making it easy to upgrade your engine with a single purchase.

Performance-Oriented Engineering:

Built to meet the demands of professional racers and performance enthusiasts, JE Pistons are trusted for their superior craftsmanship and strength. With a 13.0:1 compression ratio, this piston kit is the perfect solution for those looking to maximize power in naturally aspirated BMW S14B23 engines.

Application:

  • Fits BMW S14B23 Engines (E30 M3 models, race cars, and high-performance builds)
  • Ideal for naturally aspirated setups focusing on high RPM and peak power output.

Specifications:

  • Compression Ratio: 13.0:1, optimized for high-performance NA builds.
  • Material: Forged 2618 aluminum alloy for durability and strength.
  • Bore Size: Available in various sizes, including overbore options.
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BMW E30 M3 S14B23 3.7086in Bore 13:1 JE Pistons
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JE Piston - Corporate Logo
T#:33846576
Part#: 321364
Back Ordered
$ 899.99 USD
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JE Pistons BMW S14B23 13:1 Compression Piston Kit - 3.7086in Bore (Set of 4)

Elevate your BMW S14B23 engine’s performance with the JE Pistons 13:1 Compression Piston Kit, featuring a 3.7086-inch bore size. Designed for high-compression, naturally aspirated builds, this piston kit delivers enhanced power, faster throttle response, and exceptional reliability, making it the perfect choice for serious racers and high-performance enthusiasts alike. With JE’s world-class forged piston technology, you’ll get unmatched strength and durability to handle the most demanding environments.

Key Features:

  • 13:1 High-Compression Ratio: Optimized for naturally aspirated engines, the 13:1 compression ratio maximizes cylinder pressure for increased horsepower, torque, and efficiency. Perfect for high-RPM applications.
  • 3.7086in Bore Size: Specifically designed for the BMW S14B23 engine, this precise bore size ensures optimal fitment and superior combustion, providing the ideal foundation for high-performance builds.
  • Forged 2618 Aluminum Construction: Built from JE’s 2618 forged aluminum alloy, these pistons offer exceptional strength, heat resistance, and durability, making them capable of withstanding extreme pressures and temperatures.
  • Advanced Combustion Chamber Design: Piston crowns are engineered to improve combustion efficiency, promoting smoother, more controlled combustion for better performance and reduced detonation risks.
  • Low-Friction Skirt Coating: A friction-reducing coating on the piston skirts minimizes wear and tear, ensuring smooth operation and prolonging the life of both the pistons and the engine.
  • Complete Installation Kit: This set comes with four pistons, rings, wrist pins, and locks, offering everything you need for a full upgrade to your S14B23 engine.

Built for Power & Precision:

Engineered for peak performance, JE Pistons are known for their precision and durability. This 13:1 compression kit is tailored for those who want to push their BMW S14B23 engine to its limits, whether on the track or on the street. The 3.7086in bore ensures exact fitment and optimal combustion dynamics, maximizing both power output and reliability.

Application:

  • Fits BMW S14B23 Engines – Perfect for high-compression naturally aspirated builds, race applications, or high-performance street cars.
  • Ideal for track-focused and high-RPM setups.

Technical Specs:

  • Compression Ratio: 13:1 for naturally aspirated engines.
  • Bore Size: 3.7086 inches, designed for a precise fit.
  • Material: Forged from 2618 aluminum alloy for superior strength and heat tolerance.
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JE Pistons BMW E30 M3
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JE Piston - Corporate Logo
T#:33846571
Part#: 321358
Back Ordered
$ 899.99 USD
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E Pistons 8.5:1 Piston Kit - BMW S14B23 Engine (Set of 4)

Unleash the full potential of your BMW S14B23 engine with the JE Pistons 8.5:1 Compression Kit, engineered for maximum strength and reliability in forced induction builds. Perfect for turbocharged or supercharged applications, these pistons are designed to handle high boost levels, ensuring your engine can withstand extreme pressures while delivering smooth, consistent performance.

Key Benefits:

  • Optimized Compression (8.5:1): Lower compression ratio designed specifically for turbo or supercharged setups, helping manage cylinder pressures for greater tuning flexibility and boost potential.
  • Forged for Toughness: Crafted from 2618 aluminum alloy, these pistons are forged to withstand extreme stress and temperature, making them ideal for high-boost, high-revving engines.
  • Thermal Efficiency & Durability: Enhanced heat dissipation design reduces the risk of detonation, allowing your engine to run cooler under heavy load.
  • Friction-Reducing Skirt Coating: Helps to reduce wear, improving the longevity of both the pistons and the engine, even under intense driving conditions.
  • Complete Installation Kit: Comes with four pistons, rings, wrist pins, and locks, providing everything you need for a smooth installation process.

Why Choose JE Pistons?

JE Pistons are a trusted name in motorsport for delivering unbeatable strength and performance. This 8.5:1 piston kit allows you to push your BMW S14B23 engine to new limits with confidence, whether it’s for track use, drag racing, or a high-performance street build.

Applications:

  • Fits BMW S14B23 Engines (E30 M3, high-performance builds)
  • Ideal for turbocharged or supercharged configurations.

Technical Specifications:

  • Compression Ratio: 8.5:1 for optimal forced induction performance.
  • Material: Forged 2618 aluminum alloy for unmatched strength.
  • Bore Sizes: Customizable options for overbore requirements.
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