Standard Size is 32mm Intake / 28mm Exhaust

CAT Cams camshafts will enhance your S38 engine's performance

2000 - 2003     BMW E53     X5 4

Breakage can result in valves dropping into the combustion chamber

and street/strip applications that push engines to their limits

BMW N63 4.8L Stroker Kit by 5150 AutoSport Piston Bore:89 mm Standard Size is 32mm IntakeBMW N63 Stroker Kit by 5150 AutoSport Bigger displacement, more torque and more power; Our 5150 AutoSport Stroker Kits are specifically designed for the BMW N63 Engine. Benefits of Stroking an Engine: Higher displacement offers greater power output and torque from increased cylinder volume and improved air fuel mixture combustion Longer crankshaft stroke increases connecting rod leverage for increased torque output at lower RPMs Improved throttle