Description
CP Forged Piston Set, BMW Rolls Royce N74R, Pro Xtreme, Alusil Compression Ratio:9.5:1 Multiple ignition tables with 6D Bore Size Thickness:87.5 mm 0.089" RAD 20 0519 B48 Cylinder Head Valve lock keepers Multiple ignition tables with 6D ignition mapping leads to power loss and combustion inefficiencies at high RPMs