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This cap is a replacement for Aeroflow Performance radiator overflow tank AF77-1021 & AF77-1021BLK
Black and Silver
Suit 32mm Water Neck
which will support up to 700hp
Suit GM LS2/LS3
Aeroflow Sb Chev Roller Cam Button AF64-4351 5.4 This cap is a replacementSuits Small Block Chevy, shims included Cam Buttons limit lateral movement of the camshaft in engines without cam thrust plates and reduce friction for "FREE" Horsepower! Machining of the cam sprocket may be required.
