BMW M20 B27 - 81 mm stroke

50mm Intake / 12

The iconic M20 engine

Step 3: Tighten Studs 1 through 10 to 75 ft-lbs

5150 High-Performance Coated Rod Bearing Sets for BMW N63 and S63 engines offer superior reliability and performance

BMW S54 Cut Ring Head Gasket by Athena-SCE E46 M3 BMW M20 B27 - 81This Athena Cut Ring Head Gasket is specifically engineered to replace BMW part 11127835918 for the BMW S54 engine. 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, catastrophic engine failure. Athena SCE Cut Ring Head Gaskets are uniquely designed to handle increased