BMW Engine Parts for BMW 3 Series E30 (1984-1991)

BMW M20 Engine ARP Head Stud Kit - E30 325i, E34 525i

T#:189783

Part#: 201-4305

In Stock

$ 271.99

This product was last offered at the strikethrough price on
07-10-2026

$ 271.18 USD

Add to Wish List

Qty

$ 271.18 USD

Add to Wish List

Virtually every top professional BMW engine builder relies on ARP Pro Series head studs. ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is heat-treated to 200,000 psi, ensuring complete heat penetration. ARP studs are threaded after heat-treat, which gives them 1000% (that's ten times!) better fatigue strength than studs threaded prior to heat-treat. Threading the studs after heat-treating is more difficult and costly (as it's harder on tooling) but the results are well worth the effort. These simply are the best head studs we've found and we highly recommend them in both racing and forced induction applications. Due to the additional clamping force between the head and block, these are IDEAL for turbocharged engines.

Converting from the factory BMW head bolts to head studs makes it much easier to assemble an engine, especially a racing powerplant which must be serviced frequently (and quickly!), and also ensures proper alignment of the head and gasket. Head studs also provide more accurate and consistent torque loading. Here's why: When you use bolts to secure the head, the fastener is actually being "twisted" while it's being torqued to the proper reading. Accordingly, the bolt is reacting to two different forces simultaneously. A head stud should be installed in a "relaxed" mode -- never crank it in tightly using a jammed nut. If everything is right, the stud should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. An information sheet is provided with each set.

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 item fits the following BMWs:
1985-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1989-1990 E34 BMW 525i

Show More Show Less

BMW S14 Engine ARP Head Stud Kit - E30 M3

T#:189786

Part#: 201-4605

In Stock at Vendor

$ 160.99 USD

Add to Wish List

Qty

$ 160.99 USD

Add to Wish List

Virtually every top professional BMW engine builder relies on ARP Pro Series head studs. ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is heat-treated to 200,000 psi, ensuring complete heat penetration. ARP studs are threaded after heat-treat, which gives them 1000% (that's ten times!) better fatigue strength than studs threaded prior to heat-treat. Threading the studs after heat-treating is more difficult and costly (as it's harder on tooling) but the results are well worth the effort. These simply are the best head studs we've found and we highly recommend them in both racing and forced induction applications. Due to the additional clamping force between the head and block, these are IDEAL for turbocharged engines.

Converting from the factory BMW head bolts to head studs makes it much easier to assemble an engine, especially a racing powerplant which must be serviced frequently (and quickly!), and also ensures proper alignment of the head and gasket. Head studs also provide more accurate and consistent torque loading. Here's why: When you use bolts to secure the head, the fastener is actually being "twisted" while it's being torqued to the proper reading. Accordingly, the bolt is reacting to two different forces simultaneously. A head stud should be installed in a "relaxed" mode -- never crank it in tightly using a jammed nut. If everything is right, the stud should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. An information sheet is provided with each set.

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 item fits the following BMWs:
1987-1991 E30 BMW M3

Show More Show Less

ARP Main Stud Kit for E30 M3 S14 Engine

T#:2207

Part#: 201-5001

In Stock

$ 119.99 USD

Add to Wish List

Qty

$ 119.99 USD

Add to Wish List

This ARP main stud set for the E30 M3 eliminates main cap walk and fretting, as well as protects the threads in your engine block. Each S14 main stud is made using the best materials, process, design and engineering, which exceeds even the most stringent racing and aerospace specifications. This 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:
1988-1991 E30 M3 - S14 engine
1984-1985 E30 318i (M10)

Show More Show Less

ARP Connecting Rod Bolt Kit for E30 M3 2.3 liter

T#:2187

Part#: 201-6104

In Stock at Vendor

$ 175.99 USD

Add to Wish List

Qty

$ 175.99 USD

Add to Wish List

Set of 8 Pro-Series connecting rod bolts, made by ARP -- the world leader in fastener technology. ARP Pro Series connecting rod bolts are precision CNC-machined to exacting specifications and designed for optimum reliability. Heat-treated with threads which are rolled to provide up to ten times more fatigue strength, these rod bolts are far superior to standard OEM BMW fasteners in terms of durability and ability to withstand stresses. This rod bolt set is specifically for the E30 M3 S14 2.3 liter engine.

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.

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:
1988-1991 E30 M3 - S14 4 cylinder

Show More Show Less

BMW Rod Bolt Stretch Gauge with Billet Body & Thumb Hold

T#:4309

Part#: 100-9942

In Stock at Vendor

$ 216.99

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

$ 202.99 USD

Add to Wish List

Qty

$ 202.99 USD

Add to Wish List

We highly recommend using a stretch gauge when installing rod bolts and other fasteners, where it is possible to measure the length of the fastener.

ARP Main Stud Kit, BMW S14

T#:28537458

Part#: ARP-MSK-S14

Ships in 3 Business Days

$ 119.99 USD

Add to Wish List

Qty

$ 119.99 USD

Add to Wish List

This ARP Main Stud Kit is designed to replace BMW 11111735525 for the S14 B20, S14B23, S14B25, S14B27 engines found in the E30 M3. 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.

Show More Show Less

BMW M10 Engine ARP Head Stud Kit - 2002, E21 320i, E30 318i

T#:189784

Part#: 201-4601

Ships in 8 Business Days

$ 196.99 USD

Add to Wish List

Qty

$ 196.99 USD

Add to Wish List

Virtually every top professional BMW engine builder relies on ARP Pro Series head studs. ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is heat-treated to 200,000 psi, ensuring complete heat penetration. ARP studs are threaded after heat-treat, which gives them 1000% (that's ten times!) better fatigue strength than studs threaded prior to heat-treat. Threading the studs after heat-treating is more difficult and costly (as it's harder on tooling) but the results are well worth the effort. These simply are the best head studs we've found and we highly recommend them in both racing and forced induction applications. Due to the additional clamping force between the head and block, these are IDEAL for turbocharged engines.

Converting from the factory BMW head bolts to head studs makes it much easier to assemble an engine, especially a racing powerplant which must be serviced frequently (and quickly!), and also ensures proper alignment of the head and gasket. Head studs also provide more accurate and consistent torque loading. Here's why: When you use bolts to secure the head, the fastener is actually being "twisted" while it's being torqued to the proper reading. Accordingly, the bolt is reacting to two different forces simultaneously. A head stud should be installed in a "relaxed" mode -- never crank it in tightly using a jammed nut. If everything is right, the stud should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. An information sheet is provided with each set.

This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
1977-1983 E21 BMW 320i
1984-1985 E30 BMW 318i

Show More Show Less

ARP Connecting Rod Bolt Kit - M10 1.8L

T#:554123

Part#: 201-6304

Ships on Aug 5, 2026

$ 119.99 USD

Add to Wish List

Qty

$ 119.99 USD

Add to Wish List

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.

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 item fits the following BMW Engines:
M10 1.8L

Show More Show Less

CP Forged Piston Set BMW M20 B25 Std.

T#:26205089

Part#: CP-FPS-M20-B25

Back Ordered

$ 1,349.99 USD

Add to Wish List

Qty

$ 1,349.99 USD

Add to Wish List

CP-Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high-strength, lightweight materials and advanced engineering, this BMW M20B25 piston set features: Lightweight Design: CP-Carrillo pistons are made from high-strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved engine responsiveness and acceleration. Advanced Engineering: CP-Carrillo engineers use state-of-the-art technology and engineering techniques to manufacture pistons that offer optimized combustion, improved fuel efficiency, and increased power output. CP-Carrillo pistons are the best choice for any M20 engine and application, from street bully to all-out track car, and are engineered by one of the most respected names in motorsport to improve performance and reliability. Piston Sets Include: - Pistons - Rings - Pins - Locks - Spec Sheet

Show More Show Less

Osvat Intake Valve - E28, E30, E34

T#:1196099

Part#: 11341706631

In Stock

$ 12.99

This product was last offered at the strikethrough price on
06-22-2026

$ 10.99 USD

Limited Qty Sale

Add to Wish List

Qty

$ 12.99

This product was last offered at the strikethrough price on
06-22-2026

$ 10.99 USD

Limited Qty Sale

Add to Wish List

Standard replacement intake valve

ARP Ultra-Torque Fastener Assembly Lubricant (Select Your Size) ...

T#:338571

Part#: TMS1733

In Stock

Starting at $ 1.99 USD

Add to Wish List

Starting at $ 1.99 USD

Add to Wish List

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.

Show More Show Less

CP-Carrillo Connecting Rod Set M20 Pro-Xtreme

For Vehicles With 135mm Connecting Rods

T#:26205099

Part#: CAR-CRS-M20-XT

Ships in 3 Business Days

$ 2,099.99 USD

Add to Wish List

Qty

$ 2,099.99 USD

Add to Wish List

The 5150 AutoSport Pro-Xtreme Connecting Rods, made by CP-Carrillo, are designed to handle extreme horsepower and high RPM applications for BMW M20 engines with 135 mm Rods. Constructed from high-strength, aircraft-grade steel, these connecting rods are engineered to withstand the forces generated by high-powered engines. The Pro-Xtreme design is specifically tailored to handle up to 2000 horsepower, making these rods suitable for high-performance turbo/drag racing or street/strip applications. They are also designed to handle high engine speeds of up to 9500 RPM, which is necessary for achieving maximum power output. Each connecting rod is precisely fabricated to meet the demands of high-performance engines using advanced manufacturing techniques such as computer-aided design (CAD) and finite element analysis (FEA). The Pro-Xtreme Connecting Rods are designed to be durable, reliable, and capable of handling the extreme stresses and forces generated by high-horsepower and high-rpm engines. Please note that these 135 mm connecting rods are designed to fit M20 135mm Rod engines. They will NOT fit 130 mm Rod Engines.

Show More Show Less

CP Forged Piston Set - M20B27 - 84.5mm Bore, 8.5:1 CR

T#:26271772

Part#: CP-FPS-M20-B275

Ships in 3 Business Days

$ 1,396.99 USD

Add to Wish List

Qty

$ 1,396.99 USD

Add to Wish List

CP-Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high-strength, lightweight materials and advanced engineering, this BMW M20B27 piston set features: Lightweight Design: CP-Carrillo pistons are made from high-strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved engine responsiveness and acceleration. Advanced Engineering: CP-Carrillo engineers use state-of-the-art technology and engineering techniques to manufacture pistons that offer optimized combustion, improved fuel efficiency, and increased power output. CP-Carrillo pistons are the best choice for any M20 engine and application, from street bully to all-out track car, and are engineered by one of the most respected names in motorsport to improve performance and reliability. Piston Sets Include: - Pistons - Rings - Pins - Locks - Spec Sheet

Show More Show Less

Intake Valve - Priced Each

T#:596779

Part#: 11341267721

In Stock at Vendor

$ 13.99

This product was last offered at the strikethrough price on
05-07-2026

$ 8.99 USD

Add to Wish List

Qty

$ 8.99 USD

Add to Wish List

Replacement intake valve 40.0/6.97MM

CP Forged Piston Set, BMW M42

T#:37251106

Part#: CP-FPS-M42

Ships in 3 Business Days

$ 899.99 USD

Add to Wish List

Qty

$ 899.99 USD

Add to Wish List

Details: Bore = 84mm Compression Ratio = 10:1

ARP Head Stud Kit, BMW S14

T#:28537451

Part#: ARP-HSK-S14

Ships in 3 Business Days

$ 179.99 USD

Add to Wish List

Qty

$ 179.99 USD

Add to Wish List

This ARP head stud Kit is designed for the BMW S14 B20, S14B23, S14B25, S14B27 engines found in the E30 M3. Installing ARP head studs can provide several benefits, including increased clamping force, improved head gasket sealing, and greater overall engine strength. This is especially important in high-performance and racing applications where the engine is subjected to increased stress and higher temperatures. Before installing ARP head studs, it is important to properly clean and prepare the engine block and cylinder head mating surfaces. It is also recommended to use ARP Ultra-Torque Fastener Assembly Lubricant during installation to ensure proper torque and clamping force. Instructions: 1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser. 2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension. 3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER. 4. Screw studs into the block “HAND TIGHT ONLY”. 5. Install the cylinder head(s) and check for binding or misalignment. 6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT. Then install the washers and the nuts onto the studs and tighten them hand tight. ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.

Show More Show Less

Osvat Exhaust Valve - Sold Each - E28, E30, E34

T#:1196100

Part#: 11341708896

In Stock at Vendor

$ 35.98 USD

Add to Wish List

Qty

$ 35.98 USD

Add to Wish List

Replace your worn valves

Athena Cut Ring Head Gasket S14

T#:28537477

Part#: ATH-HG-CR-S14-95

Ships in 3 Business Days

$ 284.99 USD

Add to Wish List

Qty

$ 284.99 USD

Add to Wish List

This Athena Cut Ring Head Gasket is specifically engineered to replace BMW part 11121316714 for the S14B20, S14B23, S14B25, S14B27 engines found in the E30 M3. Factory OEM & MLS head gaskets are only engineered to handle a limited amount of cylinder pressures before they start to leak, causing a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure. Athena-SCE Cut Ring Head Gaskets are uniquely designed to handle increased cylinder pressure caused by power modifications, making them the recommended choice for applications making 16+ psi. Design: Athena-SCE's gasket body is composed of Motorgasket, a reinforced material developed by Athena's R&D department. This consists of a steel core covered with two layers of asbestos-free aramid fibre and offers excellent thermal and mechanical resistance without compromising its ability to adapt to mating surfaces. To ensure maximum sealing under all conditions, a silicone bead is also applied to critical sealing areas, such as oil and coolant passages. The AISI 304 stainless steel cooper rings bite into the aluminum head, providing maximum sealing around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2 bar boost.

Show More Show Less

ARP M3 M11-1.25 X 1.600 Rod Bolt Kit - E30 - S14

T#:54139646

Part#: 301-6032

Ships on Aug 5, 2026

18% off MSRP $ 21.99

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

$ 17.99 USD

Add to Wish List

Qty

18% off MSRP

$ 21.99

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

$ 17.99 USD

Add to Wish List

the BMW S14 engine factory rod bolts are a notorious weak link when pushing past the original redline. Inertial forces at high RPM place immense tensile stress on the connecting rods, making heavy-duty hardware an absolute necessity.

Show More Show Less

CP Forged Piston Set BMW M20 B27 Std.

T#:26205091

Part#: CP-FPS-M20-B27

Back Ordered

$ 1,349.99 USD

Add to Wish List

Qty

$ 1,349.99 USD

Add to Wish List

CP-Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high-strength, lightweight materials and advanced engineering, this BMW M20B27 piston set features: Lightweight Design: CP-Carrillo pistons are made from high-strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved engine responsiveness and acceleration. Advanced Engineering: CP-Carrillo engineers use state-of-the-art technology and engineering techniques to manufacture pistons that offer optimized combustion, improved fuel efficiency, and increased power output. CP-Carrillo pistons are the best choice for any M20 engine and application, from street bully to all-out track car, and are engineered by one of the most respected names in motorsport to improve performance and reliability. Piston Sets Include: - Pistons - Rings - Pins - Locks - Spec Sheet

Show More Show Less

Project Cars

SELECT YOUR BMW

BMW Engine Parts for BMW 3 Series E30 (1984-1991)

Sub-Categories

BMW M20 Engine ARP Head Stud Kit - E30 325i, E34 525i

BMW S14 Engine ARP Head Stud Kit - E30 M3

ARP Main Stud Kit for E30 M3 S14 Engine

ARP Connecting Rod Bolt Kit for E30 M3 2.3 liter

BMW Rod Bolt Stretch Gauge with Billet Body & Thumb Hold

ARP Main Stud Kit, BMW S14

BMW M10 Engine ARP Head Stud Kit - 2002, E21 320i, E30 318i

ARP Connecting Rod Bolt Kit - M10 1.8L

CP Forged Piston Set BMW M20 B25 Std.

Osvat Intake Valve - E28, E30, E34

ARP Ultra-Torque Fastener Assembly Lubricant (Select Your Size) ...

CP-Carrillo Connecting Rod Set M20 Pro-Xtreme

CP Forged Piston Set - M20B27 - 84.5mm Bore, 8.5:1 CR

Intake Valve - Priced Each

CP Forged Piston Set, BMW M42

ARP Head Stud Kit, BMW S14

Osvat Exhaust Valve - Sold Each - E28, E30, E34

Athena Cut Ring Head Gasket S14

ARP M3 M11-1.25 X 1.600 Rod Bolt Kit - E30 - S14

CP Forged Piston Set BMW M20 B27 Std.

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results