Does anyone recognize this exhaust???? - Pontiac G8 Forum: G8 Forums - G8Board.com
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

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post #1 of 8 (permalink) Old 07-10-2019, 06:30 PM Thread Starter
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Does anyone recognize this exhaust????

I recently bought a used (and apparently slightly modified) 2009 GT. I was immediately aware of the RotoFab CAI. So I then began checking into cat-backs/ headers. I had already put the car up on a lift to check on what I was working with underneath. After looking I came across a picture of a “stock” G8 GT exhaust on the internet. which looked nothing like the system on my car. I’m now confused as to which exhaust system I have, it doesn’t sound like I want it to. It’s a very humble tone that’s hardly noticeable to anyone when I get on the throttle. I need LOUD. It’s a straight system from the mid-muffler back, with J-Pipes right before the tips. I have what appears to be maybe resonators? Or Cats before the muffler. The car has the stock header/ exhaust manifold from what I can tell because they’re quite rusted and covered by a heat shield. Here are some pics! PS. I’m asking because I may be able to just replace the mid-muff with an X-Pipe and add headers if this is an already decent axle-back system. Thanks in advance for the help guys! I’m glad to now be a part of the G8 community!
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post #2 of 8 (permalink) Old 07-10-2019, 06:32 PM Thread Starter
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Edit: the final picture (with the red panel visible) is where the system begins going upwards towards the manifold. Not sure what the gold part is that it’s linked to is. If anyone could tell me what’s going on there as well that’d be great!
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post #3 of 8 (permalink) Old 07-10-2019, 08:19 PM
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Those are stock cats at the front. After that it looks like maybe a aftermarket mid muffler I think the stock one would be much more weathered than that. And I don't see the stock resonators in the picture. At the back it looks like homemade j pipes, but the tips are the same ones as stock. I have a solo axleback but it looks a little different than that with the J placement. I currently have the solo and X pipe with resonators and I think it sounds perfect for a daily driver.

Spectre CAI
Superchips tune
SOLO axleback
X pipe
First 888 #85
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post #4 of 8 (permalink) Old 07-10-2019, 09:23 PM Thread Starter
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Those are stock cats at the front. After that it looks like maybe a aftermarket mid muffler I think the stock one would be much more weathered than that. And I don't see the stock resonators in the picture. At the back it looks like homemade j pipes, but the tips are the same ones as stock. I have a solo axleback but it looks a little different than that with the J placement. I currently have the solo and X pipe with resonators and I think it sounds perfect for a daily driver.
Thanks for the response! Alright so I’m going to assume that the guy before me went ahead and had a shop fab up a system. It seems to resemble some sort of solo setup. I’m gonna try replacing the mid muf with an X-pipe this weekend. I have another question off topic if you don’t mind answering. If I get a set of long tubes (probably Pypes) will those replace those stock Cats and clamp to the pipe right before the muffler? I’ve seen a thread saying that they will, but I can’t imagine the headers being THAT long. Will I need a set of down/ connector pipes to meet up with the pipes before the x-pipe?
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post #5 of 8 (permalink) Old Yesterday, 12:36 AM
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Originally Posted by ErnieS View Post
Thanks for the response! Alright so Iím going to assume that the guy before me went ahead and had a shop fab up a system. It seems to resemble some sort of solo setup. Iím gonna try replacing the mid muf with an X-pipe this weekend. I have another question off topic if you donít mind answering. If I get a set of long tubes (probably Pypes) will those replace those stock Cats and clamp to the pipe right before the muffler? Iíve seen a thread saying that they will, but I canít imagine the headers being THAT long. Will I need a set of down/ connector pipes to meet up with the pipes before the x-pipe?
It does resemble one but I'm no expert on solo products, I just know how mine looks and the ones I've seen on here. Either way if you don't like the sound , I suppose that it doesn't matter. The X pipe does make it sound quite a bit better, i'd check to see the size of the piping down there just in case they changed it before you order anything. As far as the headers I don't personally have them yet but i've done quite a bit of research and the pypes longtubes should bolt right up replacing the stock cats. If you decide to get pacesetters those do need a connection pipe. Most (longtubes) though are THAT long and designed to go straight on.

Spectre CAI
Superchips tune
SOLO axleback
X pipe
First 888 #85
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post #6 of 8 (permalink) Old Yesterday, 09:11 AM
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That looks like a Solo catback to me
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post #7 of 8 (permalink) Old Yesterday, 10:50 AM
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Agreed. It looks like a SOLO exhaust system. Also, if it is a SOLO the mid-muffler may already be the X-Pipe resonator combo.

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post #8 of 8 (permalink) Old Today, 10:35 AM
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Solo Mach Balanced with stock cats is what you have. It is quiet because of the stock cats. Add the Solo cats or Kooks Mids and it will roar. DO NOT cut out the only muffler in the system. You will regret it if you do. Goto Solos site and hear that exhaust with the high flow cats. you will like it

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