HGR : Solid Carbide Valve Guide Reamers for Bronze
These premium quality carbide valve guide reamers feature an extended pilot (2" long) and multi-fluted design so you can size bronze guides perfectly. One sizes allows you to fit both intake and exhaust when using AV&V guides and valves (sold separately). Goodson recommends using at 300 to 400 RPM. DO NOT use on cast iron.