dyno proven at 5hp from a AZ member on here.

 

It isn't 2.25...hell, stock the LSJs are 2.5" until you get to the axle, then it goes down to 2.25"...thus the reason many people go the cheap way and just replace it with an axle back exhaust with muffler.

 

yea that gmpp exhaust is my next buy

 

That's what i'm trying to say. That GM Exhaust can't be 2.25"

 

ive got a wack of mods, stage kits, bolt ons and not one issue with hte size of the exhaust, keeps pullin with the more i do to the car, like i said no complaints...

 

If someone can tell me its a 2.5 im buying it.

 

I Just Ordered My Gm Exhaust Along With Stage Ii Trying To Get Installed Later In The Week

 

Its a 2.5...like I said, you already have a 2.5 until you get to the axle, the only place that makes a 2.25 is cobalt-addiction and that is for the 2.2s

 

I know it's not 2.25"
A couple threads ago there was a big discussion about either geting GM exhaust or just cut from the axel back and install a muffler. That bend over the axel is 2.25" and the rest of the stock exhaust is 2.5"
The GM exhaust is 2.5" all the way including over the axel with a free flowing muffler. That's the benefit to getting the GM Cat-Back. I don't know where this GM exhaust is 2.25" is coming from.

 

Well all know what we already have.

 

I did it myself. I got 8hp.
https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/06-ss-sc-dyno-numbers-9926/

And yes, the GMPP cat-back is 2.25, it drops down from stock. Hard to believe but it is true. There is someone who has similar mods with the exception of having a 3" exhaust and I have +20 ft/lbs or torque than he does.

 

bigger dont always mean better...

 

OK now i'm confused. I hear 2.5" I hear 2.25". Anyway whatever it is i'm getting it. I want to stay as GM as possible with this car.

 

Word. Where ya gonna buy it?

 

**** everyone who has this exhaust loves it, i do, it produces more ponies than stock so you still win, ad the exhasut manifold from gm and it feels like you took out the back seats, gutted the interior and removed the spare tire, very surprised how well it all comes together, i know people having problems with exhuast leaks, sound quality, rust and other things from comapines im not gonna mention, look at what doc produced, the system is worth the money!
good luck on yer choice bra!@

 

Probably right here. $369.00 that's not a bad price at all. I'm thinking maybe within a couple weeks from today. I like that exhaust.

http://www.crateenginedepot.com/stor...P1379C146.aspx

So BLKSS you want the touring instead of performance hah?

 

I heard really good feedback from the touring. Im gonna stick with that one I think. What do you think?

 

sport
angled tip!
my 2 cents.

 

That's where I stand too BLKSS. I'm going performance with the angle tip. I don't know much about the touring though. I'm also getting the GM manifold but not from crate engine depot, it's from a member on here.

My setup will be the GM manifold, GM performance exhaust, Cobalt Addictions 2.5" downpipe w/cat., GM angle tip.

 

Why not the whole GMPP exhaust and cat back?

 

I don't know what you mean bro. The GM exhaust performance or touring is only cat-back. I don't know of any GM downpipe that's why I will be getting one from cobalt addiction. I am getting the GM cat-back and the GM manifold. If GM made a nice downpipe I would be all over it. Do you know something about a downpipe or something? Do tell.........

 

I suck when it comes to exhausts. I dont know what do get anymore!

 

Well there are 3 major parts the exhaust.
The Manifold
The downpipe w/cat
The cat-back
So it depends how far you want to go with the exhaust.
Due to the fact you have stage 2 you are briniging in a lot of air so you need to get it out.
That's why i'm doing the entire exhaust. You should too if the funds let you.
Even just the cat-back and nothing else would help. I don't want a true header because of the heat it gives off. I like GM's manifold. A good downpipe is literaly worth 10hp by itself. So the cat-back is worth about 5hp, the manifold is worth about 5hp and the downpipe is worth about 10hp. So with the setup I plan on installing it should yeild realisticly 15-20whp.
That would be about 260whp. Not bad. You have just about the same mods as me so that's where you would be too.

 

I dont mind spending extra..

 

im looking at a down pipe too, is cobalt addictions similar to zzp dwonpipe, will it fit nice and snug and what about a cat?? will there be any rattleing noises??