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the method of defeating the sound limits is going to depend on how that track measures it. at laguna seca, there is a "sound booth" about 50 yards off the track with a staff member monitoring a decibel reader and reporting cars (car numbers are mandatory for accurate snitching) to the corner workers to promptly black flag you.
they pretend there are sensors all over the track, but this is a fib for deterrence. what you see on that silver gt3 are typical "laguna pipes" that send the sound up and away from the sound booth, and the sound doesn't echo off of the ground. also, the sound booth at laguna is in an uphill section where you'll be at wide open throttle and likely nearing redline.
if your track has a hanging microphone, or multiple areas where they monitor sound, this might not work.
super trapps held on by exhaust springs are an option, but they are expensive to build four (you order as many of those plates you see and build them for your requirements). you're looking at $400+ minimum for super trapps.
another option, buy extra oem exhaust bushings and brackets, and swap to your oem rear section without touching the hangers. its 10 nuts and about 20 minutes.
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