The exhaust side is the one that really benefits from the single angle valve seat as you want the gases to leave quickly and with as little restriction(ie.turbulence) If you look at any of the Top Fuel, Pro Stock engines the only multi angle seat is on the intake side to swirl the charge across the pistons surface. For a street engine the multi angle exhaust seat does seal better for low rpm use.
Last edited by jalopy45 #4899; 10/08/13 03:41 PM. Reason: beaters fault
