I've been enjoying going to HPDE track events and Laguna Seca is one of my favorites. For some of these HPDE track events at Laguna, there a sound limit of 92db with the listening station usually between turns 5-6 or 6-7 (where you'd usually go full throttle uphill). Will the popular aftermarket exhausts for our cars stay within this limit? I understand that on a cool foggy day, stock Z06s and GT3s can be right at this limit (if not slightly over). Any thoughts?

 

Contact 80shilling on this forum. I believe he used our 2.5 "quiet" X-Flow on his GT2 at Laguna Seca and it was at or near the limit - and it's a quiet exhaust by aftermarket exhaust standards.

 

I passed every time with my Milltek Sport and could also pass CA Smog. Flows great and not too aggressive. I now have stock exhaust back on and can feel the restriction.