COMP Cams Magnetic Deck Checker Fresh Air System Blower Wiring Harness Diamond shape road race baffle

Diamond shape road race baffle with four Trap Door Baffles

Unique Dual Range Dial Scale Is Engineered Specifically For Fast Revving

1979-1993 GMC C1500

or reverse seam as they are sometimes called

COMP Cams Magnetic Deck Checker Fresh Air System Blower Wiring Harness Diamond shape road race baffleTo calculate true compression ratio it's necessary to measure the distance between the deck surface of the block and the piston deck. Our machine aluminum deck checker incorporates magnets to hold itself firmly to the block for simple and accurate measurements. Mount a dial indicator in the center for deck height or in each end to check piston rock. Our magnetic deck checker allows for the easy mounting of a dial indicator to check piston travel.