from another thread - recommendation for Exhaust
From Tommy V -
Or to save even more weight, get a tunable SuperTrapp system and save about 50lbs over stock M Coupe/Roadsters boat anchor
OE exhaust setup. Save at least 30lbs over other aftermarket exhausts
They sound amazing and look like nothing else on the road, but do require some custom exhaust work. Need to find a quality shop.
Will have pics of mine next week. Requires custom work on the exhaust, but it will be way cool and save a ton of weight.
Until then, go here to see pics and install. His are 4" ending diameter whereas mine will be 5". Pipe inlet is 2.5" They look really
different but are the most functional setup available out of all the aftermarket exhausts. They will cost the same as a Supersprint
setup, yet they will weight about 20lbs less and be tunable for sound as well as torque/HP by a spacer system that acts on
backpressure to the engine. They sound amazing. Plus you get the added benefit of 3-4% hp gain.
http://www.danspot.org/MCoupe/Super...SuperTrapps.htm
Lastly, the Tires you want are Falkin Azenis Sports w/ assymetrical tread design. For performance and cost, they cannot be beat.