4.040" Tapered Ring Comp

The absolute best and easiest way to install pistons into the cylinder bore is with one of our Tapered Ring Compressors. These tools gently squeeze the rings and funnel the piston into the bore without ring damage or breakage. Available in all popular sizes, these extra tall aluminum ring compressors are hard anodized for long life. Designed to work on blocks with studs, they also feature a handy finger registration groove.