So I finally ordered my GMPP, I work at the dealer so it cost me $500.00 with tip. It gets installed on Saturday, I hope I will be impressed.

What are all of your first impressions with this?

Gains? Boost? Feel? Sound?

Nobody has a GMPP Cat-Back?

 

I love my GMPP Sport exhaust.

 

I have the performance cat-back and absolutly love it... def gained a few horses and a lot more head spinning

 

just put mine on the other week...460 shipped w/ straight tip....i love it! quiet, yet loud! and i LOVE being in parking garages with it!

 

I've got the touring myself, and I was blown away by how good it sounds

 

bump, anyone else?

 

I've had both , they both sound good , if your looking for a performance increase , you prolly won't feel any difference . The Performance will spit and pop on downshifts , and you won't hear the blower nearly as much as u used to . Boost will stay the same or go down slightly . Touring is the same only it's mellow and only loud when you mash on it ..... oh and you can still hear the blower .

 

How is it considered a performance exhaust when it decrease's in size from the stock exhaust pipe?

 

It stays the same it doesnt decrease...

 

i noticed very little power gain after i added on my gmpp header and catback w/ the touring tip. i love the sound from the touring because its noticable but not obnoxious. after i put on my k&n intake i felt the car opened up quite a bit. i think if you going with a catback you should compliment it with an intake to open both sides of the air flow.good luck on the install

 

jonnyb saw a 12whp increase from the exhaust, did dynoes pulls before and after on same day.

 

From a CAI one of these 'not upgraded exhausts'


A stocker put down 149 after me, granted he was auto, but I think I gained SOMETHING from the cat-back

 

I'm pretty sure they were on different day's IIRC.