I picked up my new [to me] car a few months ago and have been rocking the previous owner's crazy exhaust setup since then, but I think it's finally time to tame it down a little now that racing season is coming to an end here in NE Ohio. Unfortunately, the previous owner welded the axle-backs to the over-axle pipes, so I can't just swap them out.
Current Setup:
- Kooks long tube headers
- Offroad x-pipe
- OEM resonators
- Roush axle-back
As you can imagine, that setup is pretty loud. I think it sounds amazing when I want it to be, but there is no way that it passes SCCA's sound requirement of 100 dB. I know that most regional events, including all of mine, don't worry about that but I'd like to start attending divisional and maybe even national events. That and I'd like to be able to leave work or go down an onramp without everybody in a 1-mile radius hearing me. I want it to sound good, but I don't want to be "that guy". I really like the idle sound with this setup, and anything up to 3k rpm sounds really good, but it gets loud and raspy as hell as soon as I hit 3k.
For reference, here is a video from my last autocross event. Keep in mind that I'm not running an exhaust mic...
I think that my first step would be to swap the axle-back mufflers for something tamer. I've had my eyes on the Flowmaster FlowFX mufflers (larger square ones, not the round ones shaped like resonators), but open to other suggestions. I haven't found a video of these mufflers on a coyote without cats. I've seen a few videos of 2018+ coyotes without cats and stock mufflers and I'm not a fan - not deep enough.
What does everybody else use that meets sound-level requirements?
Current Setup:
- Kooks long tube headers
- Offroad x-pipe
- OEM resonators
- Roush axle-back
As you can imagine, that setup is pretty loud. I think it sounds amazing when I want it to be, but there is no way that it passes SCCA's sound requirement of 100 dB. I know that most regional events, including all of mine, don't worry about that but I'd like to start attending divisional and maybe even national events. That and I'd like to be able to leave work or go down an onramp without everybody in a 1-mile radius hearing me. I want it to sound good, but I don't want to be "that guy". I really like the idle sound with this setup, and anything up to 3k rpm sounds really good, but it gets loud and raspy as hell as soon as I hit 3k.
For reference, here is a video from my last autocross event. Keep in mind that I'm not running an exhaust mic...
I think that my first step would be to swap the axle-back mufflers for something tamer. I've had my eyes on the Flowmaster FlowFX mufflers (larger square ones, not the round ones shaped like resonators), but open to other suggestions. I haven't found a video of these mufflers on a coyote without cats. I've seen a few videos of 2018+ coyotes without cats and stock mufflers and I'm not a fan - not deep enough.
What does everybody else use that meets sound-level requirements?