koss1229

Whatever you choose.
Just FYI - Exhaust system consists of: header, catalytic converter, catback (piping after the cat), and axleback/muffler ("tip" what you call it).
It would make it easier for people to answer your questions if you define these terms properly. Also, it wouldn't sound so dumb

doood

iTrader: (1)

im catless

NemesisCBR

In my experience (of seeing/hearing other peoples exhausts) get two resonators and it will be quiet under driving and loud when you rip on it. Google 'high flow cat vs test pipe' and you will get an understanding of how much difference there is between the two. I wanted to know myself and now i do.

iH8RICERZ

iTrader: (1)

get one of those "cherry bombs" resonators from pep boys or your local auto store. Put that half way through your piping and it should quiet it down a little bit. OR, just find a high flowing ebay muffler if you're on a tight budget.

TunerN00b

You do understand that you're ruining the potential of the header by doing that, right?

If you don't have a reverse megaphone, you want an expansion chamber of some kind to terminate the collector length. The cat normally serves as the expansion chamber. If you want to insist on running cat-less (which is a rather ******* maneuver to pull, since there are plenty of cats out there that will flow as good as a straight pipe), at least run a resonator at the proper location to terminate the header correctly.

Otherwise, why even bother with a tuned length exhaust manifold (a.k.a. header)?

b20bFourDoorCivicLX

Update: i went to my local muffler shopp, had them install a pretty decent size resonator, with a thrush turbo muffler, it did the job, its not even loud a bit no more... 100% satisfied

collkid

How old are you bro? 16? This your first car?

Glad it worked out but man, hatin' on people that are looking for information to help you is pretty dumb. Think most people here are just thinking 'DUH a muffler will help the noise level... its a MUFFLER.' So, we are confused as to why you are even asking...

b20bFourDoorCivicLX

16? im 22 and this is my 5th car, but i can say its my favorite,,,,, but that being said, its now catless with a resonator and a performance muffler, i can say it being catless it drives way quicker, smoother etc...., thats all i was sayin lol havin it just straight pipe it wasnt driving right it kinda lost hp instead of gained(plus it was loud as a rocket)

mitchelnguyen

you did the right thing not installing a stock muffler to your 2.5 straight pipe. installing a stock muffler to a 2.5 straight pipe is the same as stock catback exhaust system.

REVIVAL!!!

for anyone who wants their car quieter, there are silencer options, cat delete resonators, and, of course, add turbo.

there are sound deaden-er applications and intake resonators also.