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Thermal R&D exhaust

ZeroTX

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So I had the Thermal Exhaust when the car was stock and it was the best sounding exhaust ive heard on a coyote PERIOD. However when I went Longtubes and no cats it was WAYYYY too loud, So I sold it and got a quieter catback. I miss the sound it had before the headers though.
What's quieter?
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CarDad29

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Yes, please share what's even quieter, lol.

I'm running LTH and it was stupidly loud with the system I had, sounded better with the MBRP street version, but I ended up getting tolerable volume using that Borla resonator, but they made 2.5" piping off my 3" headers to go to it. I want to fix that long 2.5" section but still have tolerable cold starts. Car is fairly quiet how it is now, a little louder won't be a bother, but I've spent too much money just getting here already, looking for one-and-done lol. Contemplating this new Thermal system with the resonators and mufflers, possibly adding another set of resonators in the "mid pipes" (where it's currently crush-bent 2.5" piping).
 

Whitedevil95

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I went with at stainless works Legend(quieter style) catback. Its also a GT350 catback and I wired up the valves to work for me through a remote(my car is a Gen 2). So I now have a quiet and loud mode. To me the volume level is great considering its got longtubes and no cats.
 

Free Spirit

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Yes, please share what's even quieter, lol.

I'm running LTH and it was stupidly loud with the system I had, sounded better with the MBRP street version, but I ended up getting tolerable volume using that Borla resonator, but they made 2.5" piping off my 3" headers to go to it. I want to fix that long 2.5" section but still have tolerable cold starts. Car is fairly quiet how it is now, a little louder won't be a bother, but I've spent too much money just getting here already, looking for one-and-done lol. Contemplating this new Thermal system with the resonators and mufflers, possibly adding another set of resonators in the "mid pipes" (where it's currently crush-bent 2.5" piping).
I just installed the thermal on my 2017 with 3 in 2m car deletes. It was straightpiped before and it was fking loud. Now it's extremely tame. It's definitely a one and done type of deal imo, I ended up welding some extension pipes to my cat deletes (it was welded to an xpipe so I had to cut apart the straightpipe bullshit) and now I have it bolt up to the thermal for easy removal and install. I'm not sure how it will bolt up to long tubes (if their end point sits where the stock exhaust sat then the wide cylinder style clamps might bridge the gap, the thermal is setup to monmt to OEM headers (comes with a 3in to 2.5in reduced but you don't have to use it) the helmholtz midpipe is 3in ID. Designed for a 3in pipe to slide INTO it and then be clamped or as thermal intended, a reducer. I just got some 3in pipe off Amazon, welded it up and slide it together and clamped it and it's good to go, I can try to get some sound clips this weekend if you want.
 

CarDad29

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Would appreciate a clip. Hopefully there's a barking dog for reference or something lol. Curious about cold start. I'll get "mid pipes" made or something, the system comes with the resonator portion right? Mine would be on an 18 but hopefully sound would be similar. (Single vs dual exit mufflers)
 

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vinny89gt

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I just installed the thermal on my 2017 with 3 in 2m car deletes. It was straightpiped before and it was fking loud. Now it's extremely tame. It's definitely a one and done type of deal imo, I ended up welding some extension pipes to my cat deletes (it was welded to an xpipe so I had to cut apart the straightpipe bullshit) and now I have it bolt up to the thermal for easy removal and install. I'm not sure how it will bolt up to long tubes (if their end point sits where the stock exhaust sat then the wide cylinder style clamps might bridge the gap, the thermal is setup to monmt to OEM headers (comes with a 3in to 2.5in reduced but you don't have to use it) the helmholtz midpipe is 3in ID. Designed for a 3in pipe to slide INTO it and then be clamped or as thermal intended, a reducer. I just got some 3in pipe off Amazon, welded it up and slide it together and clamped it and it's good to go, I can try to get some sound clips this weekend if you want.
Reviving an old thread. Mind posting some video clips of your Thermal catback with the cat deletes? Searching for something more reasonable since I did LTH.
 

Whitedevil95

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Reviving an old thread. Mind posting some video clips of your Thermal catback with the cat deletes? Searching for something more reasonable since I did LTH.
I dont but after I did LTH and no cats I got rid of mine. It was super loud. Thermal sounds AMAZING with stock headers and cats, best sounding exhaust ive heard. But when I did my LTH and no cats it was pretty obnoxious. So I had to move to a quieter catback sadly.
 

Free Spirit

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I dont but after I did LTH and no cats I got rid of mine. It was super loud. Thermal sounds AMAZING with stock headers and cats, best sounding exhaust ive heard. But when I did my LTH and no cats it was pretty obnoxious. So I had to move to a quieter catback sadly.
Def not anywhere near obnoxious with cat deletes. And longtubes wouldn't make it louder. Cat deletes themselves are louder on coyotes than full longtubes. Round town speeds it's heaven and basically a resonator delete on a stock exhaust level of noise. Gets a bit raspy when you step on it but way better than any other brand out there
 

Free Spirit

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Reviving an old thread. Mind posting some video clips of your Thermal catback with the cat deletes? Searching for something more reasonable since I did LTH.
I'll try to grab some this weekend, looking for anything specific? Inside the car, drive by, revving behind the car etc?
 

DM_BK

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One more happy customer with Thermal R&D catback. Definitely louder than stock during start up and when accelerating and shifting, but very quiet otherwise. My car is stock otherwise. Shoutout to @ZeroTX , your video and write-up of going through different set-ups is what finally made me make the decision.

- recorded with a gopro

https://imgur.com/gallery/thermal-r-d-FHFjHR4 - recorded with a Samsung S23 phone.
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