BMW N47/N57/ B57 CP4.2 Stroker Fuel Pump Shaft DLC coated 700hp+ New Billet Steel

We are proud to offer an affordable option to increase the HP potential from your stock BMW CP4.

These stroker CP4 shafts are machined from billet 5210 Steel, surface hardened to rockwell 58, and feature DLC coated lobes.  These are 100% new, NOT welded, and re-machined stock shafts found elsewhere on the market. 

These will fit all US N47/57 and B57 pumps.  For those that want modified pumps with pinned buckets please see the M50d pumps located in the store.