The Downforce NSX-R Style Rear Undertray Diffuser was styled after the diffuser placed on Honda's prototype NSX-R when the car was released in 2002. This diffuser, compared to the part used by Honda in production NSX-R's features more aggressive vertical fins and spans further to the rear tie brace.
The Downforce NSX-R Style Rear Diffuser is available in black gelcoat (which is meant to be painted for a finished look) or is available in exposed carbon fiber with clear coat.
In order to install this diffuser on a 1991-2001 NSX, either the Downforce 2002 Style Rear Valence, or the factory 2002 Rear Valence is required. ScienceofSpeed recommends the Downforce 2002 Style Rear Valence since the valence and diffuser flush together best.