The cap is machined from a piece of billet aluminum

Will NOT work with factory pistons

Upgrade your BMW S50B30 engine with a CAT Cams performance camshaft set—engineered to enhance power

2019-Present     F97     X3M

and #11241405890  in the BMW S50B32 Euro engines with a 139 mm length

CP Forged Piston Set, BMW S52 Pro-Xtreme Bore Size:85 mm The cap is machined from5150 AutoSport Pro Xtreme Forged Pistons by CP Carrillo for BMW S52 Engines Designed for E36 M3 owners seeking serious performance upgrades, the 5150 AutoSport Pro Xtreme Forged Pistons are built to handle the extreme demands of high horsepower S52 engines. Made by CP Carrillo, these pistons utilize aircraft grade steel, providing exceptional durability and strength for turbocharged, drag racing, or street strip applications. Unmatched Performance for