The exhaust has been on hit list for an upgrade for some time. At a recent event I got pinged for exceeding track noise limits so our hand was forced. Decision was made to delete the catalytic converter and run 3” from the header collector back (previously 2.5”). Header is RoadsterSport MAX Power. Noise would be reduced by running dual 3” stainless steel straight through mufflers behind the rear axle. The Helmholtz resonator from the previously installed RoadsterSport midpipe was retained as it does an excellent job of reducing exhaust drone.
The system was built from 3” SS exhaust pipe, two 45 degree 3” SS mandrel bends, two 180 degree 3” SS mandrel bends, and a 90 degree 3” SS mandrel bend for the outlet. Pie cuts were used for the tricky section under the diff. A V-band was used to connect the midpipe to the rear muffler assembly.
