If you’re spending the money to build or rebuild your VW aircooled engine, spend the time to make sure it’s built right! Our ring gap tools make checking the ring gap on your piston rings a breeze. No need to use a new or old piston to set the ring in place, no wondering if you’re consistently getting the ring in the same place. Our ring gap tools will consistently push the piston rings down 1cm into the cylinder and the 3d printed PLA tool won’t damage the cylinder wall. The 3 piece tool set sets 85.5, 87, 88, 90.5, 92 or 94mm piston rings.