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GTS Muffler question..

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Old Aug 12, 2017 | 11:18 PM
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Default GTS Muffler question..

Does the non-lightweight GTS muffler sound any different than an s4 muffler?
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Old Aug 13, 2017 | 05:37 AM
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It's relative to the person. You've heard Nicole's 91, that's what yours will sound like with it.
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Old Aug 13, 2017 | 09:39 AM
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FYI,

In case you aren't aware, the GT and the GTS mufflers are identical.
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Old Aug 13, 2017 | 12:38 PM
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Presumably you are trying to compare the early S4 single outlet rear mufler with the twin outlet unit fitted to the 90 S4/GT and later GTS models?

If so an interesting comparison if anyone has tried both rear mufflers back to back on their specific example.

The only thing I would note is that the early S4's seem to have the larger mid resonator as fitted to the GTS's. The 90/91 S4 and GT's seem to have the smaller mid resonator and the GTS has the larger mid resonator [presumably same as the early S4's] so comparisons presumably would need to be conditioned.
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Old Aug 14, 2017 | 10:52 AM
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Originally Posted by Gary Knox
FYI,

In case you aren't aware, the GT and the GTS mufflers are identical.
I am not sure this is true. PET shows a -03 (928-111-097-03) rear muffler for the GT (M639) and Club Sport (M637). Switzerland (with stricter noise laws) got a different -04 twin-outlet muffler (known affectionately as the "Humorless Swiss" version).

S4s through '89 got the single-pipe -01 version, then the -04 "Swiss" version. The GTS also got the -04 "Swiss" version. That's what our GTS still has, and I can report that it is very quiet-- quieter than our S4 was with the -01, and much quieter than the -03 GT muffler.

Find the -03 GT muffler if you can, they are pretty rare.
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Old Aug 14, 2017 | 07:42 PM
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It probably matters within subjective sound reports what mufflers were used upstream.
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Old Aug 15, 2017 | 12:44 PM
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Default GTS - GT muffler

Jim,

I was going on the basis of my experience. I traded a RMB to a neighbor for a nearly new GT muffler. The part number on that muffler was identical to the part number on my '94 GTS muffler.

Could be wrong, but I'm sure the original Houston owner of the GTS had not changed the muffler, as i had every service record after 22K miles.

Gary
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Old Aug 20, 2017 | 06:13 AM
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Originally Posted by The Forgotten On
It's relative to the person. You've heard Nicole's 91, that's what yours will sound like with it.
I have had a 928 International RMB for years. It gives the car a somewhat aggressive growl.

But I'm seriously thinking of going back to the stock muffler - After driving electric cars as daily drivers for 5 years, I find the RMB sound level rather annoying these days.
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Old Aug 20, 2017 | 09:59 PM
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I have a set of GT resonators let me know if you need them,
300 for the set plus shipping
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