Quote:

A friend of mine that runs a 7 sec true ten five n/a combo has a shop with a chassis dyno.He has tried everything and said on a car like yours a h pipe makes more power.Now on like a mustang or a car that runs 11 or 12's he said a x pipe has made more power.hope this helps.



I would say that his data was with some type of muffs
(with the 11-12s car) which again is a back pressure
thing... I like the H-pipe myself but it has to be
up close to the engine(primaries) to be efficient