I would like to hear more elaboration on this particular statement ^^. The longer angles like the Speedmaster's come with aren't necessarily a bad thing for the Street guys?
A quick measurement on a Speedmaster head has the 45 degree seat at .089 and the 60 degree at .105 which are both wide when you think of a race seat At around .040 on a race head. So it leaves you room to hand cut a 70 degree if you have it and a 30 cutting down some of the 45 but on street only I’m not going to thin it down to race only specs. Sometimes you gotta lean more towards longevity so you Dont have to tear down your street car every couple years. But a seat angle cut that wide on the intake is bigger than the exhaust spec.
