KPMI, EXHAUST VALVE GUIDE. MANGANESE. +.025"

KPMI, exhaust valve guide. Manganese. +.025"

Manganese bronze is softer and less durable then C630 bearing bronze but will allow a lower cost and reaming to size is quick and easy and finish can be done with simple tools like a ball hone and an electric drill. Rapid heat transfer and good lubricity. 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). Note: Special Manganese reamers & hones are available.

Fits: > 79-84 80" (1340cc) Shovelhead (NU)