How much h.p. loss?
 

Just installed a bassani x pipe with cats, after having an off-road pipe. How much h.p. have I lost to the rear wheels? I feel a loss of power but just wondering how much. See my thread for specs.....Thanks

okay, a guesstimate of mine is going to guess 7-12 HP..
the x-pipe gains over a h-pipe, but the cats reduce that and thensome..

(but don't hold me up to that, I'm just going along the fact that a 300 HP car with stock h-pipe that I knew of gained around the same going to an h-pipe... but you've got more HP, so, you might lose a bit more, to which the x-pipe adds a bit..)