If you "WANT" rasp (as I took the OP), the the easiest way is to put a y-pipe right after the o2 bung and rune straight 2.5" to a straight through DTM muffler. Or, you could just use a Spec e30 exhaust, when we are at the track, the spec class sounds like a bunch of angry bumble bees fighting for turn 1. Spec exhaust is basically a 2.25" straight through to the single ~15" resonator where the muffler used to reside.
Dual exhaust helps curb rasp.
Dual exhaust helps curb rasp.
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