ScienceofSpeed HD 3" Downpipe & Exhaust Set - NSX, 2017-22

The ScienceofSpeed HD Downpipe Set & HD Exhaust increases flow for applications in excess of 750 BHP. The factory-style 3-bolt flange used on the Sport Downpipes is eliminated in favor of a 3" v-band flange. This design maximizes flow at this joint but requires that both the HD Downpipes and HD Exhaust are used together since the factory-style flange is replaced.

The ScienceofSpeed HD Downpipe and Exhaust Set have been designed to retain the factory heat shields. These heat shields are often removed with aftermarket exhaust systems and are critical in reducing heat load to the plastic components around the exhaust system.

The HD downpipes & exhaust are specifically designed for higher output applications. At factory power output, there is no difference between the 2.5" Sport and 3.0" HD downpipes. When used in applications exceeding 750 HP, such as with KTuner Stage 4 / Pure900 turbos, output increases by up to 20 wheel horsepower compared to 2.5" downpipe and exhaust systems.