3.4L B58 Stroker Kit | 5150 AutoSport | BMW Toyota B58

Bigger Displacement, more Torque and MORE Power!!! 

Our 5150 AutoSport Bully Stroker kit is specifically designed for BMW and Toyota B58 Engines, Gen 1 and 2. This Bully kit is specifically engineered to handle up to 2000 horsepower, 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. 

Utilizing our completely custom CP-Carrillo Pro-Xtreme Forged Pistons and Pro-Xtreme Rods, as well as the specially designed 5150 4340 Billet Steel Crankshaft, our 3.4L B58 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

3.4L B58 Stroker Kit Contents 

• 5150 Autosport 4340 Billet Steel Stroker Crankshaft
  • Professionally turned, polished, and coated with anti-wear coating
  • Fully balanced
  • Compatible with standard B58 Main Bearings
• Custom 5150 x CP-Carrillo Pro-Xtreme Connecting Rods
  • Compatible with standard B58 Rod Bearings
• Custom 5150 x CP-Carrillo Pro-Xtreme Forged Pistons
  • CP-Carrillo Piston Wrist Pins 
  • CP-Carrillo Piston Rings 
  • CP-Carrillo Piston Wire Locks
• 5150 Xtreme Duty Cylinder Sleeves

Please note: the 3.4L B58 Stroker Kit includes 5150 Xtreme Duty Cylinder Sleeve Set and requires professional sleeving.

The engine block needs to be clearanced. A professional engine builder is required.

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

BMW Fitments:

2 Series

F22 / F23 M240i

F22 / F23 M240i xDrive

G42 / G43 M240i xDrive

3 Series

F30 / F31 / F34 340i

F30 / F31 / F34 340i xDrive

G20 M340i

G20 M340i xDrive

4 Series

F32 / F33 / F36 440i

F32 / F33 / F36 440i xDrive

G22 / G23 M440i

G22 / G23 M440i xDrive

5 Series

G30 540i

G30 540i xDrive

7 Series

G12 740i

G12 740i xDrive

X3 Series

G01 X3 M40i

X4 Series

G02 X4 M40i

X5 Series

G05 X5 xDrive40i

Z Series

G29 Z4

Z4 M40i

Toyota Supra

A90/A91 GR Supra 3.0