Aluminum Main Caps

Originally made to drop the weight of a block, have also been used to increase the durability of the bottom end of an engine that had cast caps. Durability is equal to steel caps. Made of 7075-T6 aircraft quality aluminum. Still worried? Every Top Fuel car in the world has aluminum main caps. 

Caps less than 1 wide are $85.00 each. Caps wider than 1, such as a rear cap, are $135.00

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