the factory auxiliary radiators do a pretty good job in stock form

the billet tank keeps the OEM pressure relief cap and sensor setup

Valve Spring Seats

Crafted with precision engineering

CAT Cams camshafts are engineered for reliability and durability

S55 Camshaft Set, BMW F80 / F82 / F83 Duration - Lift:278° / 272° - 11.20mm / 10.35mm the factory auxiliary radiators doPerformance Camshaft Set for BMW S55 Developed by 5150 AutoSport Engineered for the Demands of High Performance S55 Builds Please note: All camshafts must be installed by a professional engine builder, using the provided camshaft specification sheet. The builder is responsible for verifying piston to valve clearance and setting engine timing according to the cam card specifications, not the factory settings. The BMW S55 engine, found in the F80 M3,