Instruction Sheets for Part Number AAF-ALL26125
Allstar Performance Small Block Rear Main Seal Adapters
Seal Adapter, Billet Aluminum, 1 to 2-Piece Style, Chevy, Small Block Gen I, Kit
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Estimated Ship Date from OH, GA, TX: Monday 10/19/2026 Would you rather pick it up?
Overview
Allstar Performance Small Block Rear Main Seal Adapters
Allstar Performance small block rear main seal adapters can be used to convert 1986 and later blocks with a one-piece rear main seal to accept an older-style, 2-piece seal crankshaft. These are essential when installing an early-style (1985 and earlier) crankshaft into 1986 and later blocks. These rear main seal adapters are available in different applications and can be used with a one-piece or 2-piece oil pan, depending on your application. They are made from billet aluminum and include hardware.
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Some parts are not legal for use in California or other states with similar laws / regulations
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