Description
BMW S63 4.8L Stroker Kit by 5150 AutoSport Bore Compression Ratio:90 mm 10.5:1 proven solution for serious enthusiasts Bore Size Thickness:87.5 mm 0.089" RAD 20 0519 B48 Cylinder Head Valve lock keepers proven solution for serious enthusiasts and racers alike 3" aluminum version that's guaranteed to last the lifetime of your vehicle