COMP Cams Magnetic Deck Checker Fresh Air System Blower Wiring Harness 1979-1981 GMC K2500 Suburban

1979-1981 GMC K2500 Suburban

12 oz Pump Bottle Cleaner

Diamond shape road race baffle with four Trap Door Baffles

1979-1993 GMC C1500

1975-1975 Plymouth Road Runner

COMP Cams Magnetic Deck Checker Fresh Air System Blower Wiring Harness 1979-1981 GMC K2500 SuburbanTo 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.