KPMI, prowadnica zaworu dolotowego. C630. +.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 0.6250″ O.D. (15.88mm); 0.3745″ ID (9.51mm); 1.91″ OAL (48.51mm).