M20 ACL Race Main Bearing Set Version:Late Model Please choose early or late

Please choose early or late model depending on the year that your engine block was manufactured

New rocker arm eccentrics

With rocker arm locks

On factory M30 cylinder heads

Our Super Sport head comes standard with new Supertech stainless steel black nitride valves

M20 ACL Race Main Bearing Set Version:Late Model Please choose early or lateHigh quality standard size ACL Race Series crankshaft main bearing set. We use these ACL bearings exclusively on all of our in house engine builds. Please choose early or late model depending on the year that your engine block was manufactured. Typically early model is 1987 and older and late model is 1988 and up.