COMP Cams 4900 Magnetic Deck Dial Indicator Stand, Aluminum, Each

COMP Cams Magnetic Deck Checker.

To 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.