[HondaCivic4358]

i have a cai, and i can barely hear it, my exhaust overpowers it zuz its 2.5 inch with header, no cat, no resonator....its pretty damn loud, but i dont mind it, i was actaully thinking about getting a different muffler to change the tone...but anyway...ive seen people not even use intake piping, they just put the filter right on the throttle body...is there a reason...sound? performance? too cheap to pay for piping?