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  1. Seville and Eldorado Forum
    I want to add a dual exhaust to my 1978 Eldorado (425”) Yay 😀 or Nay ? what should I use if so?
  2. ATS General Discussion Forum
    Hello, first post on this forum. I want to upgrade my current single exhaust to a dual on my ‘14 ats 2.5l, however GM discontinued the upgrade kit. Anyone know where I can find a dual exhaust upgrade or an alternative way to replicate one?
  3. CTS/CTS-V Parts For Sale
    I am looking for the stock rear mufflers off of a 04-07 CTS-V. Ideally they would just be cut off the main pipes and shipped to me. I am in Oregon and am willing to drive within the state (would also consider southern Washington) if you happen to be here too. Previous owner did a "muffler...
  4. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    Need more loud out of my 2002 deville already did a resonator delete still have the cat and the stock mufflers I’m looking at flowmaster 44s I may get rid of the cat if it’s not loud enough after that even. But as far as I know the flowmasters are a 2.25 inlet and outlet. will these clamp to...
  5. Escalade and ESV Forum - 2015-2020
    Hey guys just wanted to show you what I did to the esky yesterday: Escalade w Flomaster super 40’s click link above
  6. ATS General Discussion Forum
    I wanted to start this thread so that I could hear the exhaust note of your 2.0t. I never see other LTGs on the road when I drive and when I do it’s always stock. When I got My ATS coupe, that big suit case muffler just felt like it took the life out of my car. So I bought an Intake and later...
  7. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    No question, not asking advice, just wanted to post this jolly video I took after finally getting both the exhaust and tank out to remedy a dead fuel pump! bonus trophy shot of the exhaust
  8. ATS Performance Forum
    I put in an aftermarket air intake and exhaust system onto my 2016 ATS and now I’m getting about 5mpg anytime I’m hitting the gas to accelerate. I’m not putting my foot down or anything like that and the turbo is producing around 5-8 psi of boost. I’m wondering if there might be an issue with...
  9. ATS Performance Forum
    I was curious to see if anyone had installed the exhaust upgraded kit, dual exhaust (22798566) from Cadillac. I was thinking about getting it installed. Has anyone ever had it installed from the factory or installed later on?
  10. 2008-2013 CTS Performance Mods
    Sounds amazing, very low note for a V6. Drones a little on the highway but not badly. I love the pops and crackles when you let off. I just cut the mufflers off and welded in pipes leaving the stock exhaust tips in place, it was really easy because the tips have hangers right behind them...
  11. ATS-V Series Forum - 2016-2019
    Expecting to be flamed for this, but the exhaust drone from my stock ATS-V 8A at low speeds is getting on my nerves and I'd like to some silencers or additional resonators to quiet it down. Is it safe to assume this will void the factory warranty? I've considered less invasive options like...
  12. CTS/CTS-V Parts For Sale
    Hi All, I have been using the OTP cutouts for a while, but I am getting tired of the drone and vibration from it exiting under the car. I would like to find a good deal on Stainless Works header back system. Hoping for a S tube mufflers, but open to chambered as well. I am located in San...
  13. ATS General Discussion Forum
    Had a small fire between the turbo and the firewall. The fire charred a few things, but I'm unable to identify a badly burnt connector that I'm sure will need replacing. Any help or photos would help a great deal. Engine also throwing a P0171 engine code which I imagine has to do with the...
  14. CTS First Generation Forum - 2003-2007
    Just trying to pin point the problem, 2003 3.2L doesnt start at times, battely ok, turn the key car starts cranking but thats about it. Doesnt throw any codes either, is this a CSP issue.
  15. 2009-2015 CTS-V General Discussion
    Ugh, I saw you at the last possible second. You looked lowered and may have had some exhaust work. Or maybe not. And I couldn't tell exactly what color you were but it looked similar to Stealth Gray...
  16. 2004-2007 CTS-V Performance Mods
    Sorry, tried searching but it wasn't working at the time. What options are available for tuning. Do any companies offer a "canned" tune thats worth anything for these CTS-V's? Just picked one up, and all it has so far is a K&N intake, and Corsa exhaust.
  17. Seville and Eldorado Forum
    The front flange of catalytic convertor bolts directly to exhaust pipe flange of motor. Engine pipe has a flexing bellows built in but I feel catalytic convertor should have flex springs on clamping bolts for further relief of flexing what is stock? Thanks
  18. CTS First Generation Forum - 2003-2007 these are for the 2010 v-6 camaro which has the direct injection version of our 3.6L engine, same block and all. these headers "should" bolt up. anyone ever going to try it?
  19. Seville and Eldorado Forum
    On ETC, when I floor it from a stop, there is a split second groaning noise that is similar to the sound traction control makes when active, or ABS -- however there is no accompanying shudder. The car shifts fine and runs fine -- however it freaks me out and I let off of the gas. If I take off...
  20. 2008-2013 CTS Performance Mods
    Just picked up a new 2010 CTS AWD 3.0L. Anyone installed one of the numerous performance chips that are available online and claim big HP and gas milage gains? What about intakes? I see KPE offers one on here. Any feedback is appreciated!