#2 - 82 lbs to work with Triple Groove Valves and Keepers

and reduce bore distortion

SuperTech employs advanced computer modeling techniques to maintain optimal stress limits in their valve springs

often caused by inadequate spring rates

2011–2015 E84 X1 xDrive/sDrive28i

BMW S58 3.4L Stroker Kit by 5150 AutoSport 11241307140 #2 - 82 lbs toBigger 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