[ats*ben]

I've been trying to find more information on what exhaust setups are able to pass the 90db sound limits at Laguna Seca. I figured a single thread would help in people listing their exhaust setups and/or if any lifting is required to pass. I would also love to see if anyone just has test pipes and is able to pass.

Post up your exhaust setup and if you need to lift or have "Laguna" pipes to pass!

X-Pipe:
Rear Section:

Pass at 90db:

Stock X-Pipe + Supersprint Race F1 Rear Section = Bimmer Barney

Stock X-pipe + Akra Evo Titanium Rear Section = Bimmer Barney

Stock X-pipe + M Performance exhaust - kyippee

OEM Xpipe + SuperSprint F1 Race Rear Section - Derbo

Stock x-pipe w/ Primary Cat Delete + Dinan Rear Section - nickauger **92db**

AFE Resonated X-pipe w/ 300 cel cats + OEM Rear Section = roastbeef

Challenge Sport (cats+resonators) + Stock Rear Section - fsmtnbiker

RPI Catless X-pipe + Stock Rear Section - P1zzaboy **Pass at 92db**

Supercharger w/ Akrapovic Evolution X-Pipe + Stock Rear Section - dogbone **Pass at 93db full throttle, 90db with lift**

Akrapovic Evolution X-pipe + Akrapovic Evolution Rear Section - fsmtnbiker

Fail:

Stock x-pipe + Bimmerworld street exhaust (~94 dB in 2018) - kyippee

Evolve HFC resonated x-pipe + Bomiz valvetronic muffler in quiet mode ~93.4 dB vs 104 db in loud mode - kyippee