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This product was last offered at the strikethrough price on
05-07-2026
One of our most popular items! We have been selling our S14 stroker kit since 1993. Since then we have sold HUNDREDS of this exact kit, and have received incredible feedback from our customers. RELIABLE Horsepower is our goal. Our E30 M3 2.5L Stroker kit uses factory BMW Evolution III parts to convert the stock 2.3 liter engine into the Evolution III 2.5 liter engine. Increasing the displacement and raising the compression yields much more torque: +50 ft/lbs @ 4000 rpm. With a stock head our 2.5 kit will make over 225 hp.
Our kit includes everything you need to convert your 2.3L into a 2.5L. We highly recommend upgrading the intake and exhaust system to allow larger 2.5L engine to breath. Call for more details and for "custom" packages. We can set you up with any other engine components you may want to replace (tensioner rails, chain guides, oil pump, etc) at the same time. For your benefit, we carry all these items (and at a great price).
The Turner 2.5 liter S14 Stroker Kit includes:
This product was last offered at the strikethrough price on
07-29-2026
This product was last offered at the strikethrough price on
07-29-2026
Upgrade your BMW's engine with JE Pistons designed for extreme applications, including professional competition, from Turner Motorsport. The N54B30 84.5mm Bore 9.5:1 Kit features high-tensile forged aluminum construction using 2618 T6 alloy for superior strength. Smooth flowing radii on domes and dishes ensure excellent flame travel, while included rings provide added convenience.
BMW N54 3.0L MAHLE Forged Piston Kit 84mm delivers superior performance and reliability for your BMW engine build. This high-quality piston kit replaces the factory cast aluminum pistons with robust forged pistons, offering enhanced durability and heat resistance. Designed to withstand the stresses of extreme temperatures, detonation, and high pressure, these pistons are ideal for high-performance applications. MAHLE Motorsport’s PowerPak Piston Kit ensures a significant upgrade in strength and reliability, making it perfect for both motorsport enthusiasts and those seeking to enhance their daily driving experience.
Specifications:
Introducing the ACL Race Series High-Performance Main Bearing Set, meticulously crafted for BMW N63 and S63 engines. Take your BMW’s engine durability and performance to the next level with these race-proven main bearings, designed to handle the demands of aggressive driving and high-RPM scenarios.
Built with ACL’s Duraglide tri-metal technology, this main bearing set ensures exceptional oil flow and resistance to wear, even in extreme conditions. Engineered for performance, this upgrade is a direct replacement for stock BMW main bearings, providing enhanced strength and longevity without compromising factory tolerances.
Key Features:
Race-proven design: Ideal for performance builds, this complete set delivers superior oiling and heat resistance, making it perfect for high-RPM use. Precision fitment: Engineered specifically for BMW’s M and S series engines, offering a reliable solution for common crankshaft bearing wear issues. Duraglide technology: Featuring tri-metal construction, including a copper-lead base and high-strength overlay, for improved oil retention and reduced friction. High-load capacity: Designed to withstand the rigors of spirited driving and competition, preventing distortion and wear during peak performance. Optimized for high performance: Eliminates tin flash plating, allowing for better bearing-to-housing contact and improved durability under extreme pressure. Whether you're rebuilding your BMW for the track or simply want to ensure reliable performance under demanding conditions, the ACL Race Series Main Bearing Set offers the perfect upgrade solution. Boost your engine’s reliability and extend its lifespan with this high-performance bearing set.
| Cam Lift (Valve Lift) I/E (mm) | Duration CRA Intake/Exhaust Peak Timing | Valve Timing CRA IO-IC-EO-EC | Valve lift at TDC I / E (mm) | Valve clearance I / E (mm) | Recommended valve springs |
| 8.7/8.6 (10.9/10.8) | 284/280/110 | 32-72 70-30 | 1.9 / 1.7 | 0.25 / 0.25 | 1982-1984: 000202090 1985-1993: 005602022 (inner) 005602062 (outer) |
Schrick Technical Information / Specs
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.
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.
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.
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.
This product was last offered at the strikethrough price on
05-07-2026
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JE Pistons BMW N54B30 Ultra Series Piston - 3.327in Bore (9.5:1 Compression Ratio)
Enhance your BMW N54B30 engine’s performance with the JE Pistons Ultra Series Piston, engineered for those who seek uncompromising power and precision. Featuring a 3.327-inch bore and a 9.5:1 compression ratio, this piston is specifically designed to optimize combustion efficiency and maximize horsepower, making it an excellent choice for both street enthusiasts and competitive racers.
Precision-Forged Performance for BMW and Toyota B58 Engines
Unlock the full potential of your BMW B58B30 or Toyota B58 engine with JE’s forged piston set, designed to provide durability, lower compression, and efficiency for turbocharged or high-performance builds. Whether you’re aiming for street performance or track dominance, these pistons offer the strength and reliability needed for modern forced induction engines.
Built for Boosted Power and Reliability
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.
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.
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JE Pistons BMW N55B30 Piston - 3.307 in Bore
Transform your BMW N55B30 engine with the high-performance JE Pistons Piston, engineered for those who demand power, efficiency, and reliability. With a precise 3.307-inch bore size, this piston is designed to enhance combustion dynamics, resulting in improved horsepower and torque. Crafted from premium forged aluminum, the JE piston is built to endure the rigors of high-performance driving, making it an ideal choice for both track enthusiasts and everyday drivers.
This product was last offered at the strikethrough price on
05-07-2026
High-Boost Forged Pistons for Your BMW B48 2.0T
JE Pistons delivers ultimate performance and durability with these forged pistons for the BMW B48 2.0T engine. Designed for high-boost and turbocharged setups, these pistons are engineered to handle extreme power and high cylinder pressures, making them ideal for performance tuning enthusiasts.
Boost Your B48 to the Next Level
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.
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.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
Here’s another description for the JE Pistons for BMW B48 2.0T with 83.00MM / -18.7CC specs, focusing on a more engaging and performance-oriented tone:
Unleash Your Engine’s Potential with JE Pistons
Take your BMW B48 2.0T to new heights with JE’s precision-engineered forged pistons. Designed for performance enthusiasts who demand power and reliability, these pistons are ideal for high-boost applications and help maximize your engine’s capabilities.
Engineered for Performance and Reliability
Whether you’re hitting the track or enjoying spirited drives, these JE Pistons are engineered to deliver exceptional performance under extreme conditions. With their robust construction and innovative design, you can confidently push your BMW B48 2.0T engine to the limits, enjoying the thrill of enhanced power and reliability every time you hit the road.
BMW S50B32 EURO Kit - Single Unit
Elevate your BMW S50B32 engine performance with the S50B32 EURO Kit, expertly designed for enthusiasts seeking to unlock the full potential of their engine. This high-performance kit is tailored specifically for the S50B32, known for its impressive power and engineering excellence. With this kit, you can experience enhanced horsepower, improved throttle response, and increased overall efficiency, making it ideal for both street and track applications.
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JE Pistons BMW S50B32 Euro Kit - 87mm Bore (5.2cc Dome)
Take your BMW S50B32 engine to the next level with the JE Pistons Euro Kit, meticulously engineered for performance enthusiasts who demand exceptional power and efficiency. With an 87mm bore and a thoughtfully designed 5.2cc dome, this piston kit is designed to enhance combustion characteristics, ensuring maximum power delivery for both street and track applications. Crafted from high-quality materials, these pistons offer the durability and reliability needed for serious performance builds.
Here’s another description for the JE Pistons for BMW B48 2.0T with 83.00MM / -12.3CC specs, focusing on a more dynamic and performance-driven tone:
Maximize Your BMW B48 2.0T's Power Potential
Unlock serious performance gains with JE’s forged pistons for the BMW B48 2.0T engine. These pistons are engineered to withstand the rigors of high-boost, turbocharged applications, offering the strength, precision, and durability needed for extreme power builds.
Built to Handle Extreme Boost
These JE Pistons are the ultimate upgrade for anyone looking to take their BMW B48 2.0T to the next level. With a design tailored to withstand high-pressure turbo setups and extreme performance demands, they provide the confidence and reliability needed to extract every ounce of power from your engine. Perfect for racers and performance enthusiasts alike.
Here’s another version of the description for the JE Pistons 12.5:1 Compression Ratio Kit for BMW S50B30US, following a more technical and product-focused tone:
Maximize Your BMW’s Power with High-Compression JE Pistons
The JE Pistons 12.5:1 kit is engineered to give your BMW S50B30US engine a significant performance upgrade. This set of six precision-forged pistons is designed for enthusiasts looking for more power through increased compression, whether on the street or the track.
Ideal for High-Performance Builds
Designed for those who push their BMW S50B30US to the limit, this 12.5:1 compression piston kit delivers improved power, torque, and reliability, especially in naturally aspirated builds or when paired with supporting modifications like higher-lift cams or race-tuned ECUs.
Enhance Your BMW B48 2.0T Performance with JE Forged Pistons
Unlock the true potential of your BMW B48 2.0T engine with the exceptional quality of JE Pistons. These forged pistons are meticulously designed for high-performance applications, ensuring that you can maximize power and efficiency while maintaining reliability in demanding conditions.
Built for Performance Enthusiasts
Whether you're a weekend warrior on the track or looking to enhance your daily driver, these JE Pistons provide the performance and reliability needed for high-boost applications. Experience improved throttle response, increased horsepower, and the satisfaction of pushing your BMW B48 2.0T engine to its limits with confidence.