Allstar Rear Main Seal Adapters

Allstar billet aluminum rear main seal adapter allows installation of a two piece style crankshaft seal and early (pre-1986) crankshaft into a 1986 and newer small block Chevy (pre-LS) engine. Adapters include mounting hardware for easy installation. The Allstar alignment tool is also available and recommended to ensure proper installation and centering of adapter plate.