KPMI, prowadnica zaworu wydechowego. C630 brąz. +.001″

C630 bearing bronze is a tough nickel-aluminum-bronze alloy typically used in High Performance and racing applications where rapid heat transfer from the valve to head is important. Note: Standard non-oversize dimensions (for reference only) are 0.4750″ O.D. (12.07mm); 0.2342″ I.D. (5.95mm); 1.655″ OAL (42.04mm).