this topic may have been posted elsewhere, but i just bought and installed the injen cai a few weeks ago (absolutely love it). on the exhaust, i have made my decision to get the gmpp cat-back and the extrude honed manifold. but i was wondering if i should upgrade the exhaust for air flow purposes, or if it wouldnt hurt my car to buy the stage 2 from gm

 

It would be good to free up your exhaust first then, gm stage 2, but either way will do the job.

 

yeah, thats what people i ask have told me. fyi- i'm not really a car buff, obviously... :P

 

Yea its all good, you will slowy learn.

 

so how much would the progress rear sway bar help the car?

and also, what about new eibach lowering springs? does the car still work fine with them? i mean, is there anything else i would have to get?

 

The sway bar will help your handling, especially in turns/cornering. I would get the exhaust and Stage 2 before that though, better gains out of them.

 

I would get the exhaust, and stage 2 before the bar, and springs, you will get more out of your stage 2 and exhaust imo, then the sway bar and springs, liek he said it wil improve handling with the bar, and your stock shocks and struts should be good with the eibach sportlines, prokit, or sportlines, i have the sportlines on my car, its more of a agressive drop then the prokit, and my car rides fine on them.

 

What are you aiming for power wise?

 

well i know after intake, exhaust and stage 2 w/tune it should be at least 260

 

I asked this same question about 2 months ago when I first joined this site. Got the same advise from the same people. Got my exhaust system sitting in boxes in the garage waiting to go on ( hard to find time to mod when you've got a new born on your hands ). Guess I just wanted to say to zach, these are some good knowledgeable people. Read and learn, then apply what you've learned. Be like a sponge, young apprentice. ROCKS

And if you get the Eibachs, make sure you get the camber adjustment kit, prevents uneven tire wear.

 

cool. thanks for that advice! but real quick, where can you buy the shorty antenna?

 

Personally, I started with the GMPP exhaust, then stage 2, and I just put on the ingalls engine damper. I have an Injen intake en route right now
I have got to say, the GMPP exhaust sounds niiiice and gives decent gains, and the stage 2, it just kicks ass.

 

I got mine off ebay.

 

I got one you can have for $5+shipping.

 

Is this estimated crank horsepower or wheel?

 

wheel hp

 

That doesn't seem likely...

 

hmm... well maybe i'm wrong

 

eventually i will order the extrude honed manifold from crateenginedepot, but are there any other parts i need along with it? on the site it also shows studs and gaskets, so i am confused

 

ummm I don't think thats to the wheels I think thats the bhp I think with the stage 2, exhaust, cai, I think its about 245 to 250 I believe... anyone else???

 

You cant just add up advertised gains and get to 260Whp. I would guess with everything you listed 235-240. Every dyno is different , so get a stock baseline and mod from there .

 

i put down 246whp with stage 2 and cai

 

you sure thats all your pushing I would think that the exhaust would give you maybe 10 more or something like that