Honing and fitting valve guides is a difficult and time-consuming job. KPMI valve guide reamers are manufactured from premium hardened High Speed Steel. The advertised finished reamer diameters are ground to: +/- .0002". These spiral fluted reamers incorporate a 1.00" long reduced diameter pilot which gets inserted into an unfinished guide bore to align the reamer to the valve guide centerline during the sizing process. These reamers have been specifically designed for KPMI Manganese Bronze and Cast Iron valve guides.

Note: Once a reamer is used with Cast Iron it is not advisable to then use it on a Manganese Bronze guide. Also, these reamers are not suitable to size C630 Nickel Aluminum Bronze guides, use

L=Length
PD=Pilot Diameter
SD=Shank Diameter