Soul Performance

There aren't any standardized sound recording variables, so it can vary well change from track to track. This is why most manufacturers don't publish DB on exhaust components, it's essentially setting themselves up to get shot in the foot in the event the testing parameters net a different result than what they tested. That said, those guys wrote up a nice little blurb about their testing experience at Laguna Seca..."We've tested the Orange on a 991 GT3 with side muffler deletes that was 104dB before the muffler and passing a 90dB day after. We've tested on a stock 991 GT3 and the car passed where it hadn't previously. And we tested on a 997.2 GT3 that had not passed at Laguna and passed a 90dB day. We've recorded the Orange GT3 Center Muffler in our own testing at 10-12dB reduction over the OEM GT3 Muffler. All of the testing was done on cars WITHOUT GPS Exhaust flap closing devices." That statement should provide realistic and repeatable sound expectations. If you end up needing to drop DB further, we are in the midst of creating resonated turndown tips that can replace the factory tip assembly in minutes. On top of that, you can also use GPS valve control devices that a few people have write ups about on this forum. This allows you to close the valves at points on the track you know they are recording sound.

Jamie@dundonmotorsports

We have many installed on high powered track cars with no issues. Generally the Quiet Muffler reduces dB by about 10dB over the OEM muffler. It's not a miracle worker, but it has helped many cars pass at Laguna that we're not able to before!

Thanks John! It's why we offer a lifetime warranty, if you break it, we want to know how!

Good people make this job a pleasure...

We don't quote an absolute number as the measurements are dependent on distance, weather conditions, dBA vs dBC, the HP rating of the car, the track configuration etc... What we can say is that compared to a Stock OEM muffler the quiet muffler is about 10-12dB quieter in our testing and in tests run by customers at Laguna Seca, LimeRock and a few others. Tests were done on 997's 991's and GT4's. Your mileage may vary, but we do offer a lifetime warranty on the mufflers and offer turn away tips as an option (if allowed at the tracks you run on).

Shoot me an email and happy to get you all setup. We even have them in stock!

Jamie

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