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Exhaust Opinions! Bone Stock WS6

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Old 11-01-2011, 02:12 PM
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Default Exhaust Opinions! Bone Stock WS6

Hi All!

Just looking for opinions really, but I have a 99 Trans Am WS6 with 109,xxx miles.

I'm the second owner and everything is stock from the first.

I'm looking to do a cat-back exhaust, any recommendations/opinions on which one I should get??? I'd prefer something "throatier" but loud is always good

Thanks!!!
Old 11-01-2011, 02:21 PM
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GMMG is the best sounding exhaust on a stock LS1 hands down. All stainless steel, but it comes at a price. If you plan on a lot of future modifications like H/C etc I'd look into true duals. Kooks has a nice TD setup but I think you HAVE to use their headers too. A lot depends on your budget.


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Old 11-01-2011, 03:29 PM
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What your price range?
The SLP PowerFlo Exhaust are nice! #31008 w/Dual tips or #31085 w single 3.5" tips. Either one will run you about $650.

Last edited by 99Bluz28; 11-01-2011 at 03:39 PM.
Old 11-01-2011, 03:35 PM
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Originally Posted by 99Bluz28
What your price range?
I'm open with price range, would prefer not to spend more then 6-7 hundred tho hope that helps!

Last edited by 777Shock777; 11-01-2011 at 03:36 PM. Reason: derp
Old 11-01-2011, 03:35 PM
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Magnaflow is a great choice for the money IMO, not too loud cruising around town but gets wicked when you get into it. But, the SLP Loudmouth would be the best if you just want something all out loud, which isn't really an expensive catback either.
Old 11-01-2011, 03:45 PM
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If you don't plan on going with headers in the future I'd say go with SLP Loudmouth1, GMMG, or Borla. If you do go with one of those and decide headers in the future, make sure to get a catted y-pipe, or you'll have rasp galore.
Old 11-01-2011, 03:51 PM
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Originally Posted by 99Bluz28
What your price range?
The SLP PowerFlo Exhaust are nice! #31008 w/Dual tips or #31085 w single 3.5" tips. Either one will run you about $650.
I have basically this setup but I think it used to be dubbed Slp's dual/dual (which incidentally always came with a powerflo) setup. Found on Firehawks, and I believe SS cars could opt for this option as well. Someone straighten out my **** here if I'm off, but I don't think I am. I have the 3 inch dual/dual on my car with some nicer tips. I have them going into a 3 inch y pipe for now, over the axle.

I'd have to say that even though you don't plan on headers now, you may later on down the road. If you do go headers, you're limited with a lm1 exhaust setup (sound=rasp=****). I'd go with some of the other choices like corsa or slp dual/dual imo. Good luck in your search, and remember sound preference is usually subjective and totally up to the owner.
Old 11-01-2011, 04:01 PM
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Originally Posted by oddwraith
I have basically this setup but I think it used to be dubbed Slp's dual/dual (which incidentally always came with a powerflo) setup. Found on Firehawks, and I believe SS cars could opt for this option as well. Someone straighten out my **** here if I'm off, but I don't think I am. I have the 3 inch dual/dual on my car with some nicer tips. I have them going into a 3 inch y pipe for now, over the axle.

I'd have to say that even though you don't plan on headers now, you may later on down the road. If you do go headers, you're limited with a lm1 exhaust setup (sound=rasp=****). I'd go with some of the other choices like corsa or slp dual/dual imo. Good luck in your search, and remember sound preference is usually subjective and totally up to the owner.


Dual/dual and PowerFlo aren't the same. Dual/dual was an option from SLP, and one of the best flowing exhausts for our cars.

PowerFlo is an aftermarket SLP loudmouth system with 2 additional mufflers at the tips.
Old 11-01-2011, 04:39 PM
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Borlamouth... /Thread
Old 11-01-2011, 04:46 PM
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Originally Posted by Dr Tran
Borlamouth... /Thread
That would also sound great on a stock car. Wish I had cats and a better merge with mine though. CME made it pretty raspy.
Old 11-01-2011, 05:12 PM
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www.ls1sounds.com

Find something you like, there will be 20 different answers on what's the best because it's all opinion based. Good luck!
Old 11-01-2011, 05:24 PM
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Borlamouth on stock manifolds/y-pipe

http://youtube.com/watch?v=Q3mNgFWGBg0
Old 11-01-2011, 05:51 PM
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If you never plan on longtubes or any future mods other than making it sound pretty good and fairly loud. Go cut the muffler and put some better tips on it.
Old 11-01-2011, 07:33 PM
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I would say SLP Loudmouth 1 if you want the loudest. It's also got a nice throaty sound to it.
Old 11-01-2011, 07:57 PM
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Originally Posted by VandykeT/A
If you never plan on longtubes or any future mods other than making it sound pretty good and fairly loud. Go cut the muffler and put some better tips on it.
And that would only cost me under $50 if I hit up Autozone!!!
Old 11-01-2011, 07:58 PM
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Originally Posted by Dr Tran
Borlamouth on stock manifolds/y-pipe

http://youtube.com/watch?v=Q3mNgFWGBg0
Yeah I don't plan on getting Headers, or any other exhaust mods (i'll save for a lower mileage M6) That does sounds GOOD XD how much did that cost ya?
Old 11-01-2011, 08:27 PM
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If I were you I would just go to a muffler shop and tell them to cut the muffler off and put a y pipe in its place and go to advance or autozone and get a nice set of tips for cheap and they are stainless. I love the way the back of my car looks with the advance tips and I only gave 60 bucks for both of them. If you buy tips you'll have probably 150 in exhaust vs. 400 and still have to install it or have it installed plus pay shipping. If you had planned for building this car with say longtubes, a cam later on down the road then I would say buy a catback but if you just want to get it a little louder I would just cut off the muffler and ditch those little factory tips. Heres my tips I love how they look on a T/A.
Old 11-01-2011, 08:55 PM
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Originally Posted by 777Shock777
Yeah I don't plan on getting Headers, or any other exhaust mods (i'll save for a lower mileage M6) That does sounds GOOD XD how much did that cost ya?
Well first It's made from a slp loudmouth 1 with the resonator removed and a borla xr1 in place of it. The xr1 is $115 and I picked up a used lm1 catback for $150. So figure around $300. Oh and no drone or rasp at all.
Old 11-01-2011, 09:00 PM
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I wonder what that borla mouth would sound like on a heads/cam car.
Old 11-01-2011, 09:31 PM
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FYI, you'll get a very similar sound with a Magnaflow#12867 for about $35 less, than the Borla XR1 #40085.


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