cutting off stock mufflers
Thread Starter
Teching In
Joined: Feb 2012
Posts: 9
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cutting off stock mufflers New to the forum. I just traded in my 07 impala lt for a stock 07 imp ss about 4 months ago... Added Cai recently but would still like to modify the exhaust to get a better sound . I was thinkin about cutting off the mufflers and running straight pipes in place of them but dont know if the sound will be too sloppy or overkill for a everyday driver? I definetly want to keep my cat and sensor so it passes pa inspection. Any advice would be appreciated.
Staging Lane
Joined: Dec 2011
Posts: 60
Likes: 0
From: Charlotte, MI
Depends on your taste I guess. I don't care for the sound of muffler delete.
On the subject of mufflers, can anyone tell me if the basic factory SS muffler is the same as the GXP muffler? I have both cars in the shop today and the GXP is most definitely louder, at idle and while driving with more interior drone. Both cars have factory exhaust.
On the subject of mufflers, can anyone tell me if the basic factory SS muffler is the same as the GXP muffler? I have both cars in the shop today and the GXP is most definitely louder, at idle and while driving with more interior drone. Both cars have factory exhaust.
Teching In
Joined: Feb 2011
Posts: 11
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I'm guessing the stock pos gxp mufflers are started to deteriorate. My gxp started to get louder and the inside drone was very loud. Lifted the car up and found a large hole in the driver's side muffler. Lift the gxp up and check both mufflers on the top.
Mine has got louder to I like it alot. Also to the op you can delete the cat and still pass just get a gutted cat and put in and a tune you will be fine. We moved from there about a year ago and I got my car to pass with a check engine light
Registered User
Joined: Jan 2012
Posts: 5
Likes: 0
From: Edmonton, Alberta
I removed the stock mufflers on my GXP and I'm a big fan of how it sounds now. With the stock resonator in place it isnt too loud. The car sounds unreal now at WOT and you get alot of people having to do a double take to see where the sound is coming from. When I removed my stock mufflers they had rusted through a bit so I'm glad i got rid of em
Teching In
Joined: Feb 2010
Posts: 27
Likes: 0
From: Weyburn SK Canada
my 05 gxp mufflers cut off and pipes welded out the back
it is a bit droney but i love it daily drive the car in summer had like this for 2 years now or so. i just picked up a 03 silverado with the 5.3 also first thing i did was cut the muffler out and run a pipe out infront of my passenger rear tire also a bit droney but i just like being able to hear the thunder of a v8
Video of my exhaust:
http://s274.photobucket.com/albums/j...Picture103.mp4
it is a bit droney but i love it daily drive the car in summer had like this for 2 years now or so. i just picked up a 03 silverado with the 5.3 also first thing i did was cut the muffler out and run a pipe out infront of my passenger rear tire also a bit droney but i just like being able to hear the thunder of a v8
Video of my exhaust:
http://s274.photobucket.com/albums/j...Picture103.mp4
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Verdad Gallardo Staging Lane
Joined: Dec 2011
Posts: 60
Likes: 0
From: Charlotte, MI
Sorry. 
I can see that. Listening to it shift in and out of overdrive over and over and over and over...I'm worried about flowmasters on the car along WITH the resonator in place. Our neighbor at the lake has a Monte Carlo SS with muffler delete and every morning was an annoyance. Just because it's loud does not mean it sounds good. Personally I thought it sounded like a 77 Chevy half ton that had a busted exhaust pipe. It was surprising to look over when you heard the roar and see a nice shiny late model car. Sorry.
Sorry. Staging Lane
Joined: Dec 2011
Posts: 60
Likes: 0
From: Charlotte, MI
Your car had better still be shifting into OD whether DoD is disabled or not. I'm just saying that it gets awful monotonous during certain throttle tip-in conditions where you have to listen to that over and over.
What you are hearing is your torque convertor locking and unlocking over and over. Mine would do this, say when I was accelerating up to speed and when the convertor would lock when I would reach my cruising speed, DoD kicking on and off would make it lock and unlock about 3-4 times until it would finally stay locked. I deleted DoD in my tune and now as soon as I hit cruising speed it locks and stays locked unless I hit the brakes, accelerate etc. . .
Staging Lane
Joined: Dec 2011
Posts: 60
Likes: 0
From: Charlotte, MI
You're right, it is converter lock up, not OD. Does the tune keep the converter from unlocking every time you let off the gas and reapplying? Just curious. I am not really interested in disabling the DoD feature on the car. It's what gives us the mileage we need when used as a work vehicle on the freeways for much of the time.
Anyway, my point is that always hearing the different pitches of the muffler delete or a similar interior droning exhaust is what I don't personally care for. Just personal preference.
Anyway, my point is that always hearing the different pitches of the muffler delete or a similar interior droning exhaust is what I don't personally care for. Just personal preference.
You're right, it is converter lock up, not OD. Does the tune keep the converter from unlocking every time you let off the gas and reapplying? Just curious. I am not really interested in disabling the DoD feature on the car. It's what gives us the mileage we need when used as a work vehicle on the freeways for much of the time.
Anyway, my point is that always hearing the different pitches of the muffler delete or a similar interior droning exhaust is what I don't personally care for. Just personal preference.
Anyway, my point is that always hearing the different pitches of the muffler delete or a similar interior droning exhaust is what I don't personally care for. Just personal preference.
Staging Lane
Joined: Sep 2011
Posts: 87
Likes: 0
I have my DOD disabled and would never go back, I only lost 3mpg and the car so much better to drive. No oil consumption, no helicopter sound, and my tune has the torque converter unlocking at 25% throttle to avoid any un-needed stress on it.
As for the thread at hand, just get yourself a good muffler, cut off the old ones and straight pipe the ends. Then cut out your resonator and put the muffler where the resonator was. Done deal.
As for the thread at hand, just get yourself a good muffler, cut off the old ones and straight pipe the ends. Then cut out your resonator and put the muffler where the resonator was. Done deal.
Staging Lane
Joined: Dec 2011
Posts: 60
Likes: 0
From: Charlotte, MI
94ss06gxp, I noticed that. I go through Shepherd all the time. We have a cottage up in Weidman.