These washers are used by many racers to properly index their spark plugs in the combustion chamber for piston dome clearance or for added power.

Acquired by VSI, LLC on November 1, 2011, Pop & Lock has been the world leader in truck tailgate security for the past 20 years. Located in Green Bay, Wisconsin, Pop & Lock provides the aftermarket with the best security products for your tailgate, truck cap and tonneau cover. With over a hundred models covering most truck applications, you can bet there is a Pop & Lock for your truck!