- Joined
- Dec 10, 2008
- Messages
- 7,253

I ran into several heads lately that had been rebuilt and the seats had been cut using a Serdi type seat cutter. The top cut on the seats were at a 15 degree angle which is the standard cutter angle used for automotive applications. Using this angle on a Norton creates a notch in the seat. I always figured this was not good for the flow so I tested it this weekend.