For GM SB2 head, standard block applications needing offset pushrod seats, .300" taller; .842? diameter; 114g weight; 1.88? seat height; .300" tall; 8 left and 8 right offsets; EDM Oil Injection Technology guarantees that the bearing assembly receives constant, pressurized oil flow via precision hole aimed at the bearings; Needle bearings are precision sorted by size to evenly distribute loads, which prevents premature wear and failure ; Durable axle is made from wear resistant tool steel to prolong the life of the roller assembly, especially in high RPM applications