Dedicated ignition switch pin

They are a popular choice for a range of motorsport disciplines such as road racing

this BMW N54 piston set features:

(16) Intake Valve Seals

enhanced heat dissipation

BMW S38 Cut Ring Head Gasket by Athena-SCE Bore Size - Thickness:93 mm - 0.079" Dedicated ignition switch pinThis S38 Head Gasket is designed to replace BMW part numbers 11121316705, 11121307529, and 11121401351, specifically for the BMW S38B35, S38B36, and S38B38 engines found in the E24, E28, and E34 M5 and M6 chassis. Factory OEM & MLS head gaskets are only engineered to handle a limited amount of cylinder pressures before they start to leak, causing a range of issues, including engine overheating, loss of power, misfires, and in severe cases,