exhaust

i recently bought a new tsudo catback exhaust for my civic hatch. ive had it for a few weeks and noticed it sounds like crap now. i have a test pipe instead of a cat and another resonator. is there a certain kind of cat that i can get that will give it a nice deep tone?

get a longer resonator.

Do a tune up. Seriously, you most likely have to get your car running right before you bolt on performance parts which may or may not even produce any power...