B58 Stroker Piston

5150 AutoSport B58 Stroker Forged Piston – Pro-Xtreme Series

Engineered to match the demands of the 5150 AutoSport B58 Stroker Kit, this custom-forged piston delivers extreme performance and uncompromising reliability for high-horsepower, long-stroke B58 builds. Developed in collaboration with CP-Carrillo, this stroker-specific piston is based on our Pro-Xtreme B58 design, with geometry tailored for the increased stroke and rod length in our 3.2L and 3.4L stroker kits.

Rated for up to 2000 horsepower and 9500 RPM, this piston is made for high boost builds—whether you're drag racing, doing roll racing, or running a full race-prepped street car. It's forged from aerospace-grade aluminum and engineered using CAD and FEA technology to reduce weight, manage heat, and thrive under extreme cylinder pressures.

Designed exclusively for use with the 5150 AutoSport Stroker Kit for BMW / Toyota B58 engines, this piston is what makes our record-breaking stroker builds possible.

Key Features:

• Custom-forged for the 5150 AutoSport B58 Stroker Kit
• Built on the Pro-Xtreme piston platform manufactured for 5150 by CP-Carrillo
• Supports up to 2000 HP and 9500 RPM
• Forged from high-strength, aircraft-grade aluminum alloy
• CAD/FEA optimized for strength, weight savings, and thermal efficiency
• Handles high compression and extreme boost
• Ideal for B58 stroker builds, drag racing, and high-performance street cars

Pro-Xtreme Piston Sets Include:

- Pistons
- PVD Rings (Install Guide Here)
- Pins
- Locks
- Spec Sheet

Please note, the Pro-Xtreme Piston is engineered to handle up to 2000HP, however, the Standard Wrist Pin can only handle 800-850HP. To exceed 850HP, it is a MUST to use Heavy Duty pins.

BMW B58 Gen 1 Applications:

1 Series

2016-2019     F20/F21     M140i

2 Series

2016-2019     F22/F23     M240i

3 Series

2015-2019     F30/F31     340i / 340i xDrive
2016-2019     F34     340i GT / 340i GT xDrive

4 Series

2016-2020     F32/F33/F36     440i / 440i xDrive

5 Series

2016-2019     G30/G31     540i / 540i xDrive

6 Series

2017-2019     G32     640i GT / 640i GT xDrive

7 Series

2015-2019     G11/G12     740i / 740i xDrive

X3 Series

2017-2019     G01     X3 M40i

X4 Series

2018-2019     G02     X4 M40i

BMW B58 Gen 2 Applications:

3 Series

2019-Present     G20/G21     M340i / M340i xDrive

4 Series

2020-Present     G22/G23/G26     M440i / M440i xDrive

Z Series

2019-Present     G29     Z4 M40i

5 Series

2020-Present     G30/G31 LCI     540i / 540i xDrive

6 Series

2020-Present     G32 LCI     640i GT / GT 640i xDrive 

7 Series

2019-Present     G11/G12 LCI     740i / 740i xDrive

X3 Series

2020-Present     G01     X3 M40i

X4 Series

2020-Present     G02     X4 M40i

X5 Series

2018-Present     G05     X5 xDrive40i

X6 Series

2019-Present     G06     X6 xDrive40i

X7 Series

2018-Present     G07     X7 xDrive40i

ALPINA B58 Gen 2 Applications:

B3 Series

2020-Present     G20/G21     B3

B4 Series

2022-Present     G22     B4

B5 Series

2020-Present     G30     B5

XB7 Series

2020-Present     G07     XB7

Toyota B58 Gen 2 Applications:

A90 / A91 Supra

2020-Present     GR Supra 3.0    
2020-Present     GR Supra 3.0 Premium    
2021-Present     GR Supra 3.0 A91 Edition