ARP 900-0400 PISTON RING COMPRESSOR (4.040" BORE)
Use only the best tools when you build your engine with the ARP 900-0400 Piston Ring Compressor (4.040" Bore). Each Piston Ring Compressor is constructed from a 6061-T6 billet aluminum tube material and is CNC machined for exact tolerances. Each ARP Piston Ring Compressor is specially made to your specific bore size. This is a must-have in the toolbox for anyone that builds engines.