I am looking for a catback exhaust for my SS. This is about the same price as a GMPP and its 2.5 instead of 2.25. Has anyone ever heard of somebody buying this exhaust before??

 

yeah. its more of a ebay brand from what i know. go GMPP

 

But you have to admit the price and descirption is some attractive. Have u ever heard of someone having it though?? And how do you like your engine dampers.. I want to buy some to!

 

I agree, go with GMPP. I have it and I love it, plus if your worried about your warranty, it keeps it in tact.

 

I know, but like you dtm2188 you dont find that restrictive?? I mean you are preatty heavily modded. Like wouldnt a 2.5 work better for you?

 

Don't go smaller than stock! I don't understand why you would want a smaller pipe diameter than your STOCK exhaust.

People that own the GMPP exhaust have an argument that the muffler and resonator are less restrictive on the GMPP exhaust. Still.... that means it is just about good as stock.

The GMPP might be good if that is the only performance modification you are doing. I just don't see it taking well to other modifications such as a header, cat replacement, more boost, etc...

 

Well, I have yet to have any problems with my exhaust set-up. Comparing the GMPP to the Stock exhaust, the GMPP is smaller but is less restrictive. I don't see unusually high amounts of boost that would be created due to more backpressure from a 2.25 as compared to a 2.5 or 3.0 set-up. And I have definatly felt a significant increase in performance when my exhaust set-up was installed. I did not do a before and after dyno, but I have been dynoed with everything listed in my sig. and I was very happy with the results. It is more recommended to go with a 3" exhaust with a 2.6" pulley, but I kinda did things out of order and did not look ahead when putting my exhaust in before deciding to drop to such a small pulley.

 

Its working for everyone who has it isnt it. it showed a 12 or 14 hp on the dyno for someone on here, and it sounds great.

 

The GMPP exhaust was dyno proven on here by another member to show a 12 hp increase. IMO I feel that that right there would prove it to be better than stock. Like I said I have the GMPP exhaust and changed both the header and downpipe and have had no problems and am happy with the results. I'm not saying that it is the best exhaust out there, but compared to the Megan Exhaust stated above, I would recommend the GMPP one.

 

Well the 3inch exhaust, even with the smaller pulley is NO good. I know it "might" give you more horsepower but the torque you loose doesn't compensate for the h/p.

"Don't go smaller than stock! I don't understand why you would want a smaller pipe diameter than your STOCK exhaust.

People that own the GMPP exhaust have an argument that the muffler and resonator are less restrictive on the GMPP exhaust. Still.... that means it is just about good as stock. "
What you dont understand is that the stock 2.5 inch exhaust from the factoru reduces to 2" in some areas. This making your 2.5 really like a 2inch exhaust. This making it more restrictive than a 2.25 GMPP one!

 

Both statements are true. As for the exhaust, yes you usually trade off hp for tq with the 3", atleast thats what I have heard.

 

Thank you, so you dont find the 2.25 restrictive?? Like if its not restrictive for you, it wont be for the upgrades I am going to have!! OH have u ever heard of someone boring the GMPP manifold?? Like machining it after at a local shop?? I just thought that might work real well.. Get the holes nice and smooth and a little bigger

 

The factory exhaust on the SS cars is 2.5" OD and the over the axle portion is 2.25" ID (not OD). It's the only section that is smaller than 2.5" and it's larger than 2.25" OD systems.

 

Yea, I don't find the exhaust to be restrictive. And I see your going down to a 2.9" pulley, so you shouldn't have anything to worry about. As for the manifold, I think there was a post somewhere on here with a member that did bore their manifold, but not sure on that, sorry. Best of luck and take advantage of that great sale price from Crate Engine Depot .

 

hahaha the shippment is to $$$ here in canada. Is not i'd be all over the christmas special. SO iam going to have to buy it downhere i supose. If you see that post again please let me know!! I really want to know how that worked out!

 

No problem man, that sucks though about the pricey shipping. I didn't even realize you were up in Canada. Now you just gotta decide between Touring or Sport/Performance.

 

im running a 2.7 inch pulley and i feel as if my gmpp exhaust is restrictive. i guess it just depends though. im also seeing around 18 to 19 lbs of boost which isnt right for the 2.7 pulley.

 

You should be seeing right around 18lbs of boost or a little more, no? The Pulleyboys 2.8" pulley shows 17.5 lbs. of boost, and your one size smaller, so you should be in the right range. I have the 2.6" and see about 19.5 lbs. of boost.

 

i say go for it, my freind has a megan racing catback on his evo and it sounds great and its a great price/good quality

 

2.25 2.5 3.0 the age old fight of whats the right size exhaust. hehe What would you like your final outcome for your car. Are you looking for going with a full drag, road race or daily driver with a lil kick to it. How far you plan on modding your car should help you decide on what size you should get. If you plan your cars build out now it will save you money in the future not having to buy the same upgrade parts again. I have seen the megan before and its actually not that bad of a system. However, that was a few years ago. You should do your research and see if they are still providing a quality product. Does it come with any kind of warranty?

 

Pacesetter gets my vote

 

Pacesetter gets my vote

 

until it rusts 1 year later

 

I wont rust any faster than the stock exaust

And the pacesetter is the best If mine rusts I will buy another pacesetter well worth it.

 

Pacesetter FTW!