The 992 GT3 and 991.2 Speedster mark a drastic departure in exhaust configuration when compared with the last 15+ years of 911 GT3. Gone are the large side mufflers and nearly universal center muffler. The 992 platform has a gigantic and complicated center muffler...
Dundon Motorsports stands behind our products with a 30-day love it guarantee. We are confident in the quality and performance of their upgrades, but if for any reason they don't meet your standards or help you push your performance on track, you can send them back within 30 days.
Availability & Lead Times
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Some products are built locally and made to order.
Typical lead time for welded components (mufflers, headers) is about 7 business days after purchase.
In rare cases timelines may change—we’ll notify you by phone.
The kit is made with 2.5" 321 Stainless Steel for a lifetime of trouble free use. We include 2.5" valves to eliminate drone by keeping the flow going to the upper path of the GT3 muffler when cruising and switching open to allow for more power!
Our kit is unique in that you can add optional 200 CPSI catalytic converters that convert race headered cars to catted cars. This is a better place for cats as the race headers can make the power and then the cats can do the conversion with only a very small HP penalty (3-4 whp in our testing).
The GT3 Muffler adapter is used in our popular D4 (stage 4) GT4 power kit, and fits all 981 chassis cars!
The 992 GT3 and 991.2 Speedster mark a drastic departure in exhaust configuration when compared with the last 15+ years of 911 GT3. Gone are the large side mufflers and nearly universal center muffler. The 992 platform has a gigantic and complicated center muffler...