LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

gxp exhaust help!

Thread Tools
 
Search this Thread
 
Old 06-22-2011 | 07:04 PM
  #21  
94ss06gxp's Avatar
TECH Addict
iTrader: (5)
 
Joined: Aug 2009
Posts: 2,351
Likes: 0
From: Mid MI
Default

Originally Posted by xdynasty725x
do you have them on your car? video??
i had one of them in place of my resenator with a 2.5" custom exhaust all the way back and it was really loud drone wise but sounded perfect on the outside, one of the best exhaust notes i have ever heard. But i have a 1 1/2 year old and its my DD so the drone had to go so i threw on a couple regular magnaflows. Im actually thinking about throwing some on my camaro.
Originally Posted by TISmyBOOMSTICK
The only problem with magnaflow is everybody has them ha im really leaning towards xr1s right now. Still have dod, i just got the car couple weeks ago and i havent had it tuned yet. a video of those bullets would be nice if anyone has one? Once i sell my w7 ill get some new mufflers and other goodies.
i guarantee no one has those magnaflow bullets. they re around $60-$70ish a piece and they have absolutly no rasp and they are loud.
Old 06-22-2011 | 10:51 PM
  #22  
GXPmattyjGXP's Avatar
On The Tree
 
Joined: Feb 2011
Posts: 173
Likes: 0
From: NJ
Default

how would my car sound with loudmouth mufflers and a magnaflow resi in?
Old 06-22-2011 | 10:53 PM
  #23  
rm08gxp's Avatar
Launching!
 
Joined: Apr 2011
Posts: 214
Likes: 0
Default

i have muffler delete....love it!!!!!!
Old 06-22-2011 | 10:55 PM
  #24  
TISmyBOOMSTICK's Avatar
Thread Starter
Teching In
 
Joined: Jun 2011
Posts: 35
Likes: 0
Default

prob slp tone but more mellow
Old 07-05-2011 | 11:33 AM
  #25  
blkchevyz's Avatar
TECH Fanatic
 
Joined: Oct 2003
Posts: 1,101
Likes: 0
Default

i did the muffler delete and it was a little loud for me. what i ended up doing is buying a flowmaster race muffler knock off with a single in dual out and just replaced the y-pipe and tail pipes. probably have less then 75 in it.
the muffler took the harshness out of it.
actually got a little seat of the pants improvement too.
Old 07-05-2011 | 01:49 PM
  #26  
TISmyBOOMSTICK's Avatar
Thread Starter
Teching In
 
Joined: Jun 2011
Posts: 35
Likes: 0
Default

finally decided to get 2 classic chambered powersticks and leave the res on for now. Gonna see how it sounds for a bit with the res on, should be plenty loud but still pretty smooth. Whats the stock piping for these cars from manifolds back? I want all 2.5 so do i just cut off after the res and do 2.5 or is it smaller before that also?
Old 07-12-2011 | 04:38 PM
  #27  
GXP25's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Aug 2009
Posts: 1,392
Likes: 0
From: Orlando, FL
Default

I bought some aftermarket tips and it turns out that our stock mufflers are not offset and the stock tips are offset to fit through the bumper cutout.

My question to you all who have made the change: What style/type of muffler do I need to get to keep my stock piping but at the same time, use these new tips?
Old 07-13-2011 | 02:58 PM
  #28  
GXP25's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Aug 2009
Posts: 1,392
Likes: 0
From: Orlando, FL
Default

David?
Old 11-22-2013 | 03:11 PM
  #29  
Brangeta's Avatar
TECH Fanatic
 
Joined: Jun 2006
Posts: 1,411
Likes: 5
From: Dallas, TX
Default

I know I'm bumping a topic from 2011, but it's exactly what my question is.

TISmyBOOMSTICK, did you end up getting a louder, but still smooth, bellowing sounding exhaust on your GXP?

I've listened to several Magnaflow clips on youtube, and it sounds like it drones too much for my taste, but I like that it doesn't pop or rasp. But at $850 + installation, it's out of my price range.

I'm curious about the Classic Chambered Powerstick mufflers or what other options exist.

Since the GXP has two mufflers, has anybody ever just done an electric cutout on just one muffler?
Old 11-22-2013 | 04:02 PM
  #30  
x11 nut's Avatar
12 Second Club
iTrader: (3)
 
Joined: Feb 2011
Posts: 382
Likes: 0
From: S. FL to Philly ??
Default

Not sure it's exactly the answer your looking for, but if you put a cutout at the downpipe it won't matter if you have one or two mufflers. Dual muffler are more about appearence, a single 3" pipe should flow better than two 2.5" pipes.
Old 11-24-2013 | 08:28 PM
  #31  
turbo_Ls4's Avatar
Teching In
 
Joined: Apr 2013
Posts: 44
Likes: 0
Default

love my cutout. have one b4 the cat and after the cat.. b4 the cat is just loud.. after the cat sounds more like a tammed 5.0L.. and have custom 3'' exhaust its had a good rumble to it.. no drone and easy for trips
Old 11-25-2013 | 12:50 PM
  #32  
Brangeta's Avatar
TECH Fanatic
 
Joined: Jun 2006
Posts: 1,411
Likes: 5
From: Dallas, TX
Default

turbo Ls4, do you have a video you can show me that compares the idle of all three? Closed cutouts, open one before the cat, open one after the cat?

Is the one after the cat before OR after the resonator on your car?
Old 11-25-2013 | 12:56 PM
  #33  
91parkave's Avatar
Moderator
iTrader: (4)
 
Joined: Feb 2008
Posts: 2,079
Likes: 9
From: Arizona
Default

Originally Posted by Brangeta
turbo Ls4, do you have a video you can show me that compares the idle of all three? Closed cutouts, open one before the cat, open one after the cat?

Is the one after the cat before OR after the resonator on your car?
Your results will be way different cause his car is turbo, you need a n/a vehicle to be accurate
Old 07-13-2015 | 05:58 PM
  #34  
crazybeaner69's Avatar
Teching In
 
Joined: Jan 2015
Posts: 12
Likes: 0
Default mandrel

if you wanted to you could get mandrel bent exhaust and then just add mufflers or straight pipe it. its nice and loud, theres a youtube video of mandrel on a gp gxp. sounds mean and loud on its own, you should check it out



Quick Reply: gxp exhaust help!



All times are GMT -5. The time now is 05:54 PM.