High-torque exhaust in a subtle design. Provides considerably more top speed . Note:. If the exhaust E-certified [reduced] is delivered, the installation complies with this condition of the original engine performance and thus can be easily used as original equipment without performance enhancement. This exhaust system is restricted in 2 places: one with two spot welds, fixed directly on the manifold flange and a second small restrictor pipe in the silencer body. Removal will give more horsepower, but invalidate the E-certification.