E39 M5 CNC OVERSIZED CYLINDER HEADS CALL FOR S/H PRICING CALL FOR PRICING (626) 452-8321 All of our cylinder heads are CFD, flow bench, and real world tested to produce the power you want. Whether you’re looking for a naturally...

E39 M5 PLENUM PLATES CALL FOR S/H PRICING CALL FOR PRICING (626) 452-8321 The RK E39 M5 plenum plates were developed to remedy the boost leaks found on the M5. Users observed pressure loss under WOT conditions at the throttle...

E39 M5 STAGE 1 SUPERCHARGER KIT CALL FOR S/H PRICING CALL FOR PRICING (626) 452-8321 The RK Autowerks E39 M5 supercharger system was developed for the enthusiast looking for more power from his or her M5. Unlike many other kits...

E39 M5 STAGE 2 SUPERCHARGER KIT CALL FOR S/H PRICING CALL FOR PRICING (626) 452-8321 The RK Autowerks E39 M5 stage 2 supercharger system was developed for the enthusiast looking for more power from his or her M5. Unlike many...

E39 M5 TRI-CORE RADIATOR CALL FOR S/H PRICING The RK Autowerks tri-core radiator uses CSF cores with a B tube technology that increases the surface area over competitive all aluminum radiators and is slightly better than OEM (the OEM cores...