Powerhouse Products Tapered Ring Compressors. Install pistons into the cylinder bore with one of our tapered Ring Compressors. These tools gently squeeze the rings and funnel the piston into the bore without piston ring damage or piston ring breakage. Available in all popular sizes, these extra tall aluminum tapered ring compressors are hard anodized for long life. Designed to work on blocks with studs, they also feature a handy finger registration groove.
4.470" To 4.625"