Really, do you have a dyno split from before and after the modification? How about a time slip from the track? Do you have anything other then Rusty's butt-o-meter, that shows he thought there was an improvement?
A 2 /12" exhaust pipe bolted directly to the exhaust manifold on my wife's Duster was worth 2 tenths on the 1/8th track that we raced at.
