Hi Don,
I have put a few of these style headers on 30s cars for friends and made up perforated tube baffles just to get them legal
the perf tube and design that i use definately hurts performance but gets us below the 95db at 2500 rpm that we need to be legal
still smoke the wheels with a 262 Small chevy even with the baffles in
Steve
I have the same baffles too. It does quiet it down some but it's still fairly loud. They are removable so when I do get it to the track
I can take them out and make some noise!