Honda muffler

[mossaidis]

re-opening this thread. I currently run the civic with ~1.5 ft 2.25" OD pipe off a SMS header into a 22" resonator then into a 2.5" ID turndown. At limerock, I posted 98 db @ 50ft. My goal is to have two systems: one for club racing and another for HPDEs/TTs where db limits are much lower ~89db @50ft. Is there a tunnel dump system that would get me down to 89db- or is a street exhuast my only option?

I want to try an muffled tunnel dump system, but don't want the expense that will only equal failure at a track day. Granted, I should get that car quieter anyway...