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Old Mar 17, 2009 | 05:03 PM
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Default Mufflers
Is there a difference between GT and GTS mufflers?
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Old Mar 17, 2009 | 08:07 PM
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Originally Posted by RKD in OKC
Is there a difference between GT and GTS mufflers?
if you are talking about the two small mufflers in front of the transaxle yes. At least the 89 GT has smaller (and louder) resonators than the GTS.
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Old Mar 17, 2009 | 10:50 PM
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I know the resonators are different, I was wondering about the muffler.
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Old Mar 17, 2009 | 10:57 PM
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having had both with stock mufflers, i'm pretty sure they are the same.
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Old Mar 17, 2009 | 11:16 PM
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I have used both and sound the same.
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Old Mar 17, 2009 | 11:39 PM
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The rear single muffler is the same for S4, GT, GTS's. The resonators are different.
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Old Mar 18, 2009 | 12:15 AM
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The rear muffler is different between S4 and GT. The GT was a very light weight twin outlet muffler vs the heavier S4 that has one large oval outlet. The GT weighs about the same as a RMB and is a straight thru design. I think the GTS is the same as the GT as far as the twin outlet and straight thru design but the material used may be different. The GT didn't seem to be stainless and mine developed pin holes.
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Old Mar 18, 2009 | 12:37 AM
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I have the small resonators and the GT rear muffler( twin tail pipes instead of the Oval) on my 88 plus an X pipe it sounds good, and its nice for cruising , not too loud in the cabin
Last edited by Mrmerlin; Mar 18, 2009 at 11:35 AM.
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Old Mar 18, 2009 | 12:38 AM
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Default GT MUFFLER AND GTS
The 1990 and up the gt muffler and the gts-s4 are the same.The rest of the year gt and s4 are the resonators before the rear muffler.I hope that is the info i know are correct.
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Old Mar 18, 2009 | 01:23 AM
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Thanks, I was just wondering before went through the 30 minutes putting the stock muffler back to see how it sounds.
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Old Aug 15, 2009 | 09:30 PM
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I took the exhaust (cat, GTS resonators, RMB) off the GTS today. HOLY CRAP the 'big' GTS resonators are heavy. Makes me want to find a pair of GT resonators (or just get a bigger exhaust fabbed up.....)

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Old Aug 15, 2009 | 09:33 PM
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Yup, the resonators are 1/2 the size. Since I'm running the X-pipe/GT resonators/RMB, I'm going to put the S4 resonators on there to quiet it down.
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Old Aug 15, 2009 | 09:48 PM
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Originally Posted by SeanR
Yup, the resonators are 1/2 the size. Since I'm running the X-pipe/GT resonators/RMB, I'm going to put the S4 resonators on there to quiet it down.
Sean

Are you running cats or cat-less?

I'm running X-pipe/race cats/RMB on my '91 GT and like the sound.
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Old Aug 15, 2009 | 10:13 PM
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The GT and GTS muffler make the exact same sound when they hit the side of the dumpster on the way in......
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Old Aug 15, 2009 | 10:21 PM
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Originally Posted by deutschmick
Sean

Are you running cats or cat-less?

I'm running X-pipe/race cats/RMB on my '91 GT and like the sound.
I've got the high flow cats on it. I admit that when I drive it locally it sounds great, intoxicating really. But on long drives the drone kills my head. Especially around 2100-2200 RPM. The resonance sucks. Ive also had it this way for 2+ years and have the larger resonators to switch out, but have not yet.

If I keep the speedo at 70+ it's fine, 60 or below is fine also. But funny, our speed limits are 65...........
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