5150 AutoSport Head Gasket & Head Stud Kit, BMW N54

  Cut-Ring Head Gasket: The Athena Cut Ring Head Gasket is designed as a direct replacement for BMW part # 11127557265 and 11127557266, specifically for use in N52 and N54 turbocharged inline-six engines. These engines can be found in a variety of models including the 135i, 335i, 535i, Z4 sDrive35i, X6 xDrive35i, and Alpina B3 Bi-Turbo. Standard OEM & MLS gaskets can only handle a certain amount of cylinder pressures before they start to leak, making the Athena Cut Ring Head Gasket the recommended choice for applications making 16+ psi. A compression leak passing the head gasket can cause a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure.Athena's gasket is crafted with premium quality reinforced M0115, an asbestos-free material that's original equipment approved and renowned for its superior quality. The AISI 304 stainless steel Cooper Rings bite into the aluminum head, providing maximum sealing capabilities a