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5150 AutoSport

BMW S58 3.4L Bully Stroker Kit by 5150 AutoSport

BMW S58 3.4L Bully Stroker Kit by 5150 AutoSport

Regular price $9,499.99 USD
Regular price Sale price $9,499.99 USD
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Shipping calculated at checkout.
Piston Bore
Compression Ratio
Cylinder Sleeves

Bigger displacement, more torque and more power.

Our 5150 Autosport Bully Stroker kit is specifically designed for BMW S58 Engines. 

Utilizing CP-Carrillo Pro-Xtreme Forged Pistons and Pro-Xtreme Rods, as well as the 5150 4340 Billet Steel Crankshaft, our stroker kits have stood up to the tests and trials of high horsepower applications time and time again. 

Benefits of Stroking an Engine

- With higher displacement, your engine will produce greater power and torque, thanks to increased cylinder volume and improved air-fuel mixture combustion
- The longer stroke in the crankshaft increases the leverage on the connecting rods, resulting in increased torque output at lower RPMs
- Improved throttle response
- Increased horsepower

Kit Contents 

- 5150 Autosport 4340 Billet Steel Crankshaft
          - Professionally turned, polished, and coated with anti-wear coating
          - Fully balanced
- CP-Carrillo Pro-Xtreme Connecting Rods
- CP-Carrillo Pro-Xtreme Forged Pistons**
- CP-Carrillo Piston Wrist Pins 
- CP-Carrillo Piston Rings 
- CP-Carrillo Piston Wire Locks

 **85 mm Piston option comes includes 5150 Xtreme Duty Cylinder Sleeve Set

5150 stroker kit offers displacements ranging from 3325 cc to 3404 cc, depending on the selected bore size:

84 mm bore size results in a displacement of 3325 cc
85 mm bore size yields a displacement of 3404 cc

Have more questions? Contact our engine build advisors to discuss your build.


A special thank you to our partners at RK Autowerks, who were an integral part of this project and worked tirelessly with our engineers to create this kit, as well as test before and after results. Without them, this truly unique, ultra-high quality kit would not be possible.


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