Seat Cutter - Valve Spring - 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 M8 cylinder head material under the valve spring seat pocket to the top side of the exhaust port is fairly thin even more so on ported cylinder heads.
• Designed for M8 cylinder heads using high lift camshafts - see Feuling M8 valve springs kits part# 1107,1108,1207.

Manufacturer Part Number: 9023