I was thinking of straight piping my cobalt lt 2.2l, i was gonna do 2 1/4 in. But ive seen some recommend 2.5 in.
Im just going full bolt on, no sc or tc.
Opinions?
Sent from my Atrix 2

 

i have strait 3in but I have a turbo that quiets it down a bit.

 

Right. Ive seen a solid 3 in for turbo.

But ive seen alot of 2.5 talk for bolt on.
Then 2.25 with talk of loss of back pressure

 

Ur car will sound like crap if u straight pipe it

 

Ive heard it, and it actually sounds good. deep and raspy.

 

YouTube - 2010 Cobalt LT muffler delete

 

Raspy it's a good thing. Lol
And that sounds terrible.

 

When you say straight pipe, are you meaning from the header back, cat back, or a muffler delete?

Regardless they're all going to sound raspy, you should stick with a nice 2.25 with a performance chambered muffler and long resonator. You'll probably like that better.

 

Down pipe and back. I assume thats a muffler delete. And iwas gonna put a resonater on it. How does that change the sound?

 

I'm gonna have to agree with the op on this one, sounds sick!

 

A resonator quiets it down some.
And I don't think it would be considered straight pipe if there's a resonator. I think straight pipe is no muffler no cat and no resonator.
Correct me if I'm wrong

 

Well i was going the no cat and muffler route. I like it loud. But i dont wanna be the ass of the neighborhood

 

if you do it on anything but a SS/TC its ****. sounds stupid, especially on a 2.2

 

I agree with u.

 

if you run no muffler do NOOOOOTTTTTT cut the resonator or cat out. Taking either one will produce the worst sound humanly possible and your friends/neighbors will want to hang you.

 

If you dont want to be the ass, dont do what your planning..

 

Don't...

 

Straight pipe on a car making less than 160whp lol.

 

if you want to run with no muffler, get a 4" wide 2.5" in/out magnaflow xl resonator/muffler and have it welded on in place of the stock muffler i did that to a mercury sable and it sounded like a G35!

http://www.youtube.com/watch?v=RDquWVfdrXg

I had no cat so there was a little rasp, i added a high flow cat later and it took it away.

Although for $160 you can just get a nice catback so its not really worth it.

 

n/a straight pipe = sounds like straight ass.


unless you're turbo you have 3 options.

catless with a resonator and muffler.
cat and resonator with a muffler delete
cat and muffler with a resonator delete.

whatever you do do not straight pipe it

 

straight pipe will sound like pure butthole and your neighbors will want to hang you.

theres no need for a straight pipe. at minimum get a resonater on it

 

If you're going to remove the muffler get the largest resonator possible, also advising against removing the cat, at least replace it with a high flow cat.

 

Well ive taken all the thoughts in. Keeping the cat, im gonna put a resonator and cut off muffler and extending out and putting a new tip on.

 

yea bro keep the cat

 

i was thinking you might be a moron