2003-2005     E60/E61     525i

The ARP 201-4303 head stud kit is custom-designed for the BMW S54 inline 6-cylinder engine and serves as a replacement for the BMW head bolts 11127831862 commonly found in E46 M3 and E36/7 Z3 M Roadster

these pistons utilize aircraft-grade steel

while precise control of harmonics maximizes reliability under extreme conditions

#11241713342

Cometic Multi-layer Steel Head Gasket, BMW M20 Bore Size - Thickness:85 mm - 0.070" 2003-2005 E60/E61 525iThis Cometic MLS Head Gasket is designed to replace BMW part numbers 11121722734, 11121722735, 11121722737, and 11121722738, specifically for the M20B20, M20B23, M20B25, and M20B27 engines. Cometic MLS Gaskets are composed of multiple layers of stainless steel, the number of layers used varying by application. These layers consist of both proprietary, high temperature coated and uncoated stainless steel. Additional layers increase active seal height