ScienceofSpeed Sport+ Valve-Delete Exhaust - NSX, 2017-on


The ScienceofSpeed Sport+ Valve-Delete Exhaust maximizes performance from the 2017 NSX.

The exhaust features two 2.5" exhaust tubes which increase diameter from the factory and when used with the ScienceofSpeed Sport Downpipes, eliminates the 2.1" bottleneck in the factory exhaust track. This size is optimized for exhaust pulse velocity. Larger tubing does not produce more power.

The ScienceofSpeed Sport+ Valve-Delete Exhaust removes the factory electronic exhaust valves. Removing the valves reduces weight and increases flow from the exhaust system. ScienceofSpeed includes weather-tight electronic valve simulators which are plug and play for the factory electrical harness connector to prevent system faults caused when the valves are removed.

Note: to change the exhaust sound from the 2017, the downpipes create the largest difference in sound output. ScienceofSpeed recommends using this product with the ScienceofSpeed Sport Downpipe Set. There will be minimal sound difference in Sport + mode if only this exhaust is used.

The ScienceofSpeed Sport+ Valve Delete Exhaust system is manufactured from 100% T304 stainless steel and includes epoxy dry carbon fiber exhaust tips.


  • Full US-sourced 304 stainless steel construction.
  • Retains all three factory heat shields - critical design feature due to proximity of exhaust components to heat sensitive plastic panels and electrical components.
  • Compatible & recommended to be used with ScienceofSpeed Sport Downpipe Set.
  • Optimized flow path based on modeling.
  • Valve-delete design eliminated valve plate for reduced restriction.
  • Includes exhaust valve simulators with weather-tight connectors for plug and play removal of valves - no check engine lights.
  • Dry carbon fiber exhaust tips look more aggressive in factory exhaust finisher.


  • ScienceofSpeed Race Exhaust System
  • ScienceofSpeed Exhaust Valve Simulators
ScienceofSpeed Sport+ Valve-Delete Exhaust - NSX, 2017-on