ARP 900-2125 PISTON RING COMPRESSOR (4.2125" BORE)
Use the ARP 900-2125 Piston Ring Compressor (4.2125" Bore) for your engine build. Built tough, this Piston Ring Compressor is CNC machined from 6061-T6 billet aluminum tube material. The Piston Ring Compressor gets the job done quick and easy. ARP's Ring Compressors are made to the specific bore on your engine and are far superior to other conventional tapered devices on the market.