Thanks in advance for your input gentlemen, I always appreciate it. I have a few questions..... This winter I want to put a full exhaust on, Is the GMPP Catback just as good as most aftermarket ones? (I was thinkin about a DC catback)any other suggestions? Also what size downpipe would you reccomend? One last question.... I want to get the GMPP honed manifold but.... what are some good headers in your opinions? Thanks guys for the help. I put alot of stock into your opinions!

 

the GMPP catback has a 1/4 inch size difference in piping so you may get more gains getting a 2.5 inch aftermarket exhaust, supposably the GMPP has a gain of 12-15whp, i didn't feel a thing though even with the honed manifold. I don't see a point in getting a 3" downpipe since most exhausts are 2.5', so i'd recommend a 2.5' downpipe. the GMPP manifold is a joke, i felt no gains with that either.

 

first i just want to say that there are a million and a half threads about exhausts but im not one to flame or give someone a problem... the gmpp is 1/4in smaller than a 2.5in with almost all the companys make problem..its a good mod for a almost stock car a 2.5in will still show some more gains tho..if your planning on doing alot of mods the gmpp will become restrictive and youll find yourself buying a 2.5 or bigger so i would go with a 2.5 or bigger if i was you.....i myself bought the hahn 3in catback and will be putting on 2.5in zzp headers/downpipe combo soon seems to be the best for the right price 2! stock the 3in takes bottom end away its true but once i got a CAI and my stage 2 it came to life! and you cant beat the deeper tone a 3in gives i love it...if you end up going hahn PLEASE DO NOT buy the entire exhaust it is a complete rip off for the headers/downpipe they are wayyyyy expensive not worth it but the catback is great for other mods

 

if you put a honed manifold and gmpp catback on and felt nothing....

your butt dyno is broken

 

Why did you waste your money on those shitty mods in the first place?

 

Ummmmm I didnt...... The only mod I have is an injen CAI. Thats why I asked your opinions on what I SHOULD get. Thank you.

 

DO NOT get a honed manifold or the GMPP exhaust. Both waste's if you want the best performance for your buck.

Best catback would be a custom 2.5" which can be had for 150-200 dollars
Best bang of the buck header is ZZP's 1 3/4th Painted Mid length header and DP combo

 

if i get a diffrent exhaust other then a gmpp what prices am i looking at. and is it going to be an exact bolt on in place?