BMW Internal Engine Parts for BMW 3 Series E46 (1999-2005)

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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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ARP - Corporate Logo
T#:2210
Part#: 201-6201
Ships in 7 Business Days
$ 222.99

This product was last offered at the strikethrough price on
08-13-2026

$ 194.99 USD
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$ 194.99 USD
Free Shipping on orders $49 and up
Set of 12 ProSeries connecting rod bolts, made by ARP -- the world leader in fastener technology. Each bolt is made of ARP2000 material, which exceeds the strength of 8740 Chrome Moly, and is able to achieve clamp load at 220,000psi. ARP2000 fasteners are used widely in motorsport and drag racing as an upgrade from 8740 Chrome Moly in both steel and aluminum rods. These are simply the best connecting rod bolts available, making them ideal for ultra high performance, racing and forced induction applications.

This set replaces the factory BMW rod bolt number 11-24-1-739-728 (11241739728) which measures 44mm in length. The 44mm BMW rod bolt was used on all US spec E36 M3 (3.0 and 3.2 liter), 1999-2000 E46 323i/323Ci, 2001-2005 325i/325Ci, Z3 1.9,2.5 and 3.2, as well as Z4 2.5. It was also used on SOME of the M50 2.5 liter engines from 1992-1995 -- but check before ordering! Opened ARP bolt kits are not returnable. If your M50 2.5 liter engine has 53mm rod bolts, you will require kit part# 201-6301 instead.

ARP is a company that prides itself on performance and durability, no matter the application. Offering the finest engine hardware money can buy is the driving initiative at ARP and this is evidenced by the staggering amount of satisfied customers and race teams the world over.

These ARP connecting rod bolts fit the following BMWs:
1992-1995 E36 325i/is *** with 44mm rod bolts only ***
1995-1995 E36 M3 S50 3.0 liter (US model)
1996-1999 E36 M3 S52 3.2 liter (US model)
1999-2000 E46 323i & 323Ci (US)
2001-2005 E46 325i, 325xi & 325Ci (US)
1998-2002 Z3 2.3 / 2.5 liter
1998-2000 MZ3 M Roadster & M Coupe
2003-2005 Z4 2.5 liter
*** DOES NOT FIT E36 328 ****
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ARP - Corporate Logo
T#:2192
Part#: 201-5002
In Stock at Vendor
$ 171.99 USD
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This ARP main stud set is for the S54 3.2 liter, as found in all 2001 to 2006 E46 M3, as well as the 2006-2008 Z4 M Roadster and M Coupe models. Switching to the ARP main stud kit eliminates main cap walk and fretting, as well as protects the threads in your engine block. Each stud is made using the best materials, process, design and engineering, which exceeds even the most stringent racing and aerospace specifications. This S54 main stud kit includes hardened parallel-ground washers and aerospace quality nuts.

The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 190,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others. On the E30 M3, there's no reason to settle for anything less than the best, which is why we carry and use ARP fasteners and studs on our own BMW race cars.

ARP is a company that prides itself on performance and durability, no matter the application. Offering the finest engine hardware money can buy is the driving initiative at ARP and this is evidenced by the staggering amount of satisfied customers and race teams the world over.

This ARP main stud kit fits the following BMWs:
2001-2006 E46 M3 3.2 liter coupe/convertible
2001-2002 MZ3 M Coupe & M Roadster (S54 engine)
2006-2008 MZ4 M Coupe & M Roadster
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JE Piston - Corporate Logo
T#:599658
Part#: 297117
In Stock at Vendor
$ 1,324.99 USD
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JE, BMW, S54B32, 3.425 in. Bore, 11.50:1, Inverted Dome/Dish, 6 Cyl. Piston Kit As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag strip, JE Pistons’ performance is proven in victory lane time and time again. Equip your engine with the best in forged pistons. Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications Designed specifically for each engine and use application to provide optimized performance durability Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin Skirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noise Accumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings Made 100% in the USA Specifications: Piston Series: JE Pistons Cylinder Head: S54B32 USA Bore Diameter: 87.00 MM Piston Head Type: Dish Compression Height: 1.271 IN Piston Volume: -13.20 CC Piston Material: 2618 Piston Quantity: 6 Forging Type: FSR Piston Average Weight: 329 GR Ring Set Included: Yes Top Compression Ring Thickness: 0.0400 IN Second Compression Ring Thickness: 0.0480 IN Oil Ring Thickness: 0.111 IN Wrist Pin Outer Diameter: 0.827 IN Wrist Pin Length: 2.250 IN Wrist Pin Wall Thickness: 0.150 IN
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ARP - Corporate Logo
T#:26171653
Part#: ARP-MSK-M50
Back Ordered
$ 169.99 USD
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This ARP Main Stud Kit is designed to replace BMW 11111735525 for the M50/M52/S50/S52 engines that were used in a variety of BMW models. One significant advantage of these main studs is their ability to prevent main cap walk, which can occur when the main caps shift or move out of position, potentially causing damage to the engine. In addition, ARP Main Studs can safeguard the threads of your engine block, providing an extra layer of protection against potential damage. When opting for main studs instead of factory bolts, it's important to note that the engine builder should mic the bores. Using studs may require a line hone to ensure proper fitment and alignment. A line hone is a machining process that can be used to resize and reshape the main bearing bores, ensuring that they are perfectly round and concentric. This is crucial for ensuring proper oil clearance and preventing premature bearing wear. By mic'ing the bores and performing a line hone if necessary, engine builders can ensure that the main studs are installed correctly and that the engine will perform reliably and at its best. Installation Instructions: To ensure accurate torque readings and proper thread engagement, thoroughly clean all threads in the engine block. If necessary, use an ARP chaser to chase the threads. Before installing any hardware, carefully inspect and clean it for defects, shipping damage, and proper fit, length, and dimension. Gently screw the main studs into the engine block by hand until they are snug. Install the main caps, checking for any binding or misalignment. Apply ARP Ultra-torque fastener assembly lubricant to the threads of the studs, nuts, and washers. Install the washers and nuts onto the studs and tighten them by hand. It is highly recommended to use the ARP Ultra-torque fastener assembly lubricant provided with the kit, as it provides consistent clamping force and reduces friction on the studs. Do not use motor oil or other low-quality lubricants. PRELOAD (TORQUE) RECOMMENDATIONS 7. Following the manufacturer-recommended torque sequence tighten the nuts in steps 1-3 Step 1: Tighten to 20 ft-lbs. Step 2: Tighten to 40 ft-lbs. Step 3: Tighten to 60 ft-lbs. With the included ARP Ultra-Torque fastener assembly lubricant
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ARP - Corporate Logo
T#:338571
Part#: TMS1733
In Stock
Starting at $ 1.99 USD
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Starting at $ 1.99 USD
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If you are using a premium fastener, such as the ARP brand rod bolts, head bolts, or main bolts, then you will want this assembly lube. Made to be used to precisely duplicate all ARP fastener preload specifications.
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JE Piston - Corporate Logo
T#:33679693
Part#: 297172S
In Stock at Vendor
$ 1,324.99 USD
Free Shipping on orders $49 and up

The BMW JE Piston S54B32 11.5:1 Piston Single 86.50mm is a high-performance piston designed to optimize the power and efficiency of BMW S54 engines. With an 11.5:1 compression ratio, this piston is ideal for those seeking to push the performance limits of their vehicle. Built from top-quality materials, it offers superior durability, making it suitable for both street and track applications. Available at Turner Motorsport, this piston ensures enhanced reliability and a precise fit for BMW S54 engines.

This piston is designed to withstand the demands of high-performance driving while improving overall engine combustion and efficiency. It is an excellent choice for BMW owners looking to improve engine performance, longevity, and power output. Detail: 86.50 mm Bore – 1.220 in. CH, -9.40 CC

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JE Piston - Corporate Logo
T#:33646290
Part#: 397118S
In Stock at Vendor
$ 251.99 USD
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Unlock your BMW S54's potential with the JE S54B32 piston—crafted from lightweight forged aluminum for ultimate strength and performance. Detail: 11.5:1 Compression - 87.50 mm Bore – 1.271 in. CH, -13.80 CC
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JE Piston - Corporate Logo
T#:33679701
Part#: 297175S
In Stock at Vendor
$ 251.99 USD
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p>JE Pistons BMW S52B32 USA Piston - 12.5:1 Compression – 87.00 mm Bore – 1.220 in. CH, -5.50 CC is a top-tier performance upgrade for BMW enthusiasts seeking to unleash the full potential of their S52B32 engine. Designed for precision and reliability, these pistons are offered by Turner Motorsport, ensuring that every component meets the highest standards of performance.
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JE Piston - Corporate Logo
T#:33679697
Part#: 297174S
In Stock at Vendor
$ 251.99 USD
Free Shipping on orders $49 and up
JE Pistons BMW S52B32 USA Piston – 12.5:1 Compression 86.50 mm Bore – 1.220 in. CH, -5.00 CC is an advanced piston engineered for high-performance BMW engines. Specifically designed for the S52B32 engine, this piston delivers exceptional compression and power, making it a must-have for performance enthusiasts. Available at Turner Motorsport, this USA-made piston is perfect for drivers who demand both reliability and peak engine performance.
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JE Piston - Corporate Logo
T#:33646305
Part#: 297171S
In Stock at Vendor
$ 251.99 USD
Free Shipping on orders $49 and up

The BMW JE Piston S54B32 9:1 Piston Single 87.00mm is a premium performance upgrade designed for BMW enthusiasts looking to enhance engine durability and output. Specifically crafted for the BMW S54 engine, this piston ensures optimal compression and power, providing the necessary strength to handle high-performance driving conditions. Available through Turner Motorsport, this piston is engineered to meet the demands of both street and track driving, offering exceptional reliability.

The precision-crafted piston ensures a perfect fit, allowing for improved combustion efficiency and overall engine performance. It's the ideal choice for drivers seeking to boost their BMW’s power and longevity.

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JE Piston - Corporate Logo
T#:33646296
Part#: 297120S
In Stock at Vendor
$ 251.99 USD
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The JE Piston's precise engineering ensures optimal fit and reliability, making them a top choice for BMW enthusiasts seeking improved engine performance. Dimensions 87.50 mm Bore – 1.271 in. CH, -9.20 CC
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JE Piston - Corporate Logo
T#:33646285
Part#: 297115S
In Stock at Vendor
$ 251.99 USD
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Featuring a 9:1 compression ratio, these pistons are lightweight and robust, reducing reciprocating weight for quicker engine response. Detail: 87.00 mm Bore – 1.271 in. CH, -29.30 CC


JE Piston - Corporate Logo
T#:28836407
Part#: JE-FPS-M54B30
Ships on Nov 30, 2026
$ 2,654.99 USD
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Cat Cams - Corporate Logo
T#:25838979
Part#: 1304402
Special Order: No Guaranteed ETA
$ 1,642.99 USD
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JE Piston - Corporate Logo
T#:27171928
Part#: 297120
Back Ordered
$ 1,324.99 USD
Free Shipping on orders $49 and up
JE Pistons Forged Piston Set of 6 – 87.5mm Bore – 11.5:1 CR – BMW E46 M3 S54B32 Maximize the performance of your BMW E46 M3’s S54B32 engine with this set of 6 JE forged pistons. Engineered for strength and high-revving capability, these pistons are built to withstand the demands of high-performance applications. 87.5mm Bore: Increased bore size for improved displacement and power output. Compression Ratio: 11.5:1: High-compression design enhances combustion efficiency and delivers more horsepower and torque. Forged Aluminum: Lightweight and durable, designed to handle high stress and heat, making it perfect for both street and track use. Precision Fit: Ensures seamless installation and compatibility with the BMW S54B32 engine, providing reliability under extreme conditions. Perfect for serious performance builds, these pistons offer a balance of durability, power, and efficiency.
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JE Piston - Corporate Logo
T#:33646293
Part#: 297119S
Back Ordered
$ 299.99 USD
Free Shipping on orders $49 and up
The 12.5:1 compression JE piston for the S54b32 is designed to help maintain thermal efficiency and minimizes weight. Detail: 12.5:1 Compression 87.00 mm Bore – 1.271 in. CH, -8.70 CC
JE Piston - Corporate Logo
T#:33646279
Part#: 297116S
Back Ordered
$ 299.99 USD
Free Shipping on orders $49 and up
JE Pistons are premium forged components tailored for racing and high-performance engines. Detail: 87.50 mm Bore – 1.271 in. CH, -30.00 CC

JE Piston - Corporate Logo
T#:33646299
Part#: 297170S
Back Ordered
$ 299.99 USD
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JE Pistons BMW S52B32 USA Piston – 86.50 mm Bore – 1.220 in. CH, -25.10 CC is an exceptional choice for BMW enthusiasts seeking to boost their engine's performance. Offered by Turner Motorsport, this high-quality piston is specifically engineered for the BMW S52B32 engine, ensuring a precise fit and enhanced reliability. Its optimized design significantly increases compression, resulting in improved horsepower and torque for both racing and daily driving.

  • Increases compression ratio for better power output
  • Lightweight construction enhances overall engine performance
  • Designed for durability and longevity in high-stress environments
  • Ensures a perfect fit for the BMW S52B32 engine
  • Ideal for both competitive racing and everyday driving scenarios
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JE Piston - Corporate Logo
T#:33679694
Part#: 297173S
Back Ordered
$ 299.99 USD
Free Shipping on orders $49 and up
The JE Pistons BMW S52B32 USA Piston – Compression 11.5:1 - 87.00 mm Bore – 1.220 in. CH, -9.90 CC is a premium piston upgrade designed for BMW performance enthusiasts who seek to improve their engine’s power and reliability. Engineered with precision, this piston offers an ideal balance of strength and lightweight construction, ensuring optimal performance under high stress. Available through Turner Motorsport, this piston is specifically tailored for BMW S52 engines, providing a seamless fit for enhanced engine efficiency.
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