BMW S54 3.4L / 3.5L Stroker Kit by 5150 AutoSport

5150 AutoSport 3.4L / 3.5L BMW S54 Stroker Kit – Maximize Displacement, Torque & RPM

Upgrade your BMW S54 engine with the 5150 AutoSport 3.4L / 3.5L Stroker Kit, engineered for more displacement, higher torque, and extreme high-RPM performance. Designed for track, drag, and endurance racing, this kit delivers unmatched reliability and power in high-horsepower applications.

At the heart of this stroker kit is the 5150 AutoSport 4340 Billet Steel Crankshaft, built for strength under extreme loads. Paired with CP-Carrillo Pro-Xtreme Forged Pistons and Pro-Xtreme Connecting Rods, this kit supports 9,600+ RPM capability when equipped with the right components. Whether pushing naturally aspirated power or forced induction, this setup has been track-proven and dyno-tested to deliver results.

5150 teams have applied this kit in Hill Climb, Road Racing, Endurance Racing, Rally, Time Attack, Drag Racing, Roll Racing, Drifting, and Street applications, all with powerful results.

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, 97mm Stroke 
      - Professionally turned, polished, and coated with anti-wear coating
      - Fully balanced
- SP Components Connecting Rods (Rated for 1,000HP, 8500 RPM)
     - Optional Upgrade to Carrillo Pro-Xtreme Connecting Rods (Rated for 2,000HP, 9500 RPM)
- CP-Carrillo Pro-Xtreme Forged Pistons
     - CP-Carrillo Piston Wrist Pins 
     - CP-Carrillo Piston Rings 
     - CP-Carrillo Piston Wire Locks

Our stroker kit offers varying displacements, ranging from 3300 cc to 3500 cc, depending on the selected bore size:

84.5 mm bore size for 3270 cc displacement
85 mm bore size for 3303 cc displacement
85.5 mm bore size for 3342 cc displacement
86 mm bore size for 3381 cc displacement
86.5 mm bore size for 3420 cc displacement
87 mm bore size for 3460 cc displacement
87.5 mm bore size for 3500 cc displacement

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