i disagree, heres why
if you put a downpipe on a stock system, youd get 13hp,(this is how it got dynod)
then if you remove the cat, you free up about 5-7 more
and then you do custom exhaust, eliminating that gay muffler we got, and you gain an estimated 5 hp.
so in all a full exhaust setup should net you about 23 hp. at the flywheel anyway.
all i know is that i felt the car change after each mod. so im sure there ARE SOME diminishing returns. but not much if any.
