It might make a small difference, but if you're a Bracket racer, what's a half a tenth?
I was talking to one of the baddest King Street/Pro footbrake racers in our area yesterday and I asked him how come he runs mufflers on his Nova, because none of us race where they're required.
He said it was so he could hear us fast guys coming up on him . . . He listens for the "Whomp" and knows how much they dialed down or up . .
He is a killer even when he runs against the "Box" guys . . Mucho feared, always in the semis or finals . .
Take that one to the F--king bank!