Lindy tools valve, clearance cutters. only used once, worked amazing. they fit 11/32 stems. I got them for 2.02 intake and 1.6 exhaust but I’m sure that will work for bigger valves the way the cutters are. I paid over $300 for the setup, I’m looking for $200 shipped. I know I’m new here, if you search my username, I’m active on other forms and eBay with 100% positive feedback.