Has anyone on here tried the GM Performance parts exhust manifold or the cat back exhaust (Performance or Touring). Does anyone know how they compare to other aftermarket offerings. Are they worth if or just go with different brands?

Thanks for any help anyone can offer.


Catback Exhaust:
http://www.gmgoodwrench.com/accessor...78362168729524

Exhaust Manifold:
http://www.gmgoodwrench.com/accessor...78362168729524

 

the GM Extrude Honed exhaust manifold will only flow about 30cfm more. you'd be better off going with an aftermarket header. try searching on the site and you'll find some answers and clips of the exhaust. there are a couple people with that setup

 

I have the gmmp performance catback and its great, it is manufactured by borla for gm

 

I have the gm header, and exhaust. they make a great pair.. but like cobaltss422 said.. you might be better off gettin a different header.. when i took mine off.. i noticed they use the factory header but just bore it out so its smoother for better air flow, but i can say that i did notice a difference. Im dont regret either one.

 

Any one want to sell me their stock exhaust manifold for cheap (those with GMPP manifolds that is)?

 

Hrmmm why would you want another stock one? But i may be interesed in gettin rid of mine, just sitting in my closet taking up space lol

 

Probably to hone and extrude himself. Might not be a bad idea.

 

i looked into it. to get a good job done, it would be some major coin. unless you've got a machine shop

 

I am good with a dye grinder and dremel.. How much shipped to 15601?

 

the honing that GM uses is some sort of strange fabric then run through it. i dunno if a die grinder would reach. if so, i'd be interested myself. esp if i can then get it heat coated.

 

I am aiming to find out. It can't be anywhere near as bad as my STI manifolds were and I did those with alot of patience.