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R Theory Motorsports
NA/NB MX-5 Miata Flat Underbody Kit (1990-2005)
Prices are in USD and include shipping within the lower 48 States and Canada. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.If you look under a pre-2010 car, it’s very...$399.79 -
R Theory Motorsports
NA/NB Miata Ultimate Aero Kit
Prices are in USD. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.Do it once and do it right. We put together a kit featuring all the killer aerodynamic parts that we...$3,506.69 - $3,738.09 -
NA/NB MX-5 Miata V3 Rear Diffuser Kit (1990-2005)
*Prices are in USD, includes shipping within the Lower 48 States and Canada. For international shipping please visit our International Shipping page for a shipping quotation.It's here folks, the R Theory Motorsports V3 Rear Diffuser has landed. The V3...$348.75 - $417.75 -
NA/NB MX-5 Miata V2 Rear Diffuser Kit (1990-2005)
Prices are in USD. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.Lo and behold the much awaited V2 Miata Rear Diffuser! R Theory designed the V2 diffuser to be wider,...$399.99 - $449.99 -
NA/NB MX-5 Miata V1 Rear Diffuser Kit (1990-2005)
Prices are in USD. All mounting hardware is included. For international shipping please visit our International Shipping page for a shipping quotation.The R Theory Motorsports V1 Rear Diffuser Kit will make the rear of your Miata look amazing while...$286.98 - $355.98
