FEULING OIL PUMP CORP. Valve Spring Seat Cutter - M8 9023

Valve Spring Seat Cutter - M8
Machine valve spring seats for proper installed spring height and spring cup fitment, Hardened pilots fit all 3/8" and 1/2" hand drills , Cutter bodies and pilots are interchangeable, Cutter: Cuts spring seat 0.550" ID x 1.180" OD, The M-Eight cylinder head material under the valvespring seat pocket to the top side of the exhaust port is fairly thin even more so on ported cylinder heads.