We have a custom exhaust this year. What we did was do a straight through glasspack right behind the header pipe and then did a 90 degree turn right before the rear wheel so it comes out the right side. We fabricated two tips, one straight and one with a supertrapp. While we have not had any sound tests and in this area only waterford hills has serious sound regulations, the supertrap is quiet, my guess is we will be well under 90. Of course all our sound readings are on the left side of the car, so I guess having it out the right side will help on the readings.

Not too sure how long the glasspack will last given the high heat of the rotary. The tips come on and off in 10 seconds, we fabricated two quick release pins to put them on and off.

Dick Plank