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FS Performance Engineering - NB Mazda Miata "The Monstrosity" Rear Diffuser

NB (1999-2005) Mazda Miata "The Monstrosity" Rear Diffuser

  • Sale
  • Regular price $669.00


NB Mazda Miata 1999 2000 2001 2002 2003 2004 2005 Monstrosity Rear Diffuser

Two words describe this beast: Monstrous + Functional. That is why we've named this rear diffuser "The Monstrosity".  We designed The Monstrosity with zero compromise. It is for the track. Feel free to purchase this diffuser if you feel like standing out, making a statement, love the idea behind it, or simply want to improve how air flow exits the rear of your car.

Why this rear diffuser screams quality:

  • Curved profile at a 6 foot radius
  • Spans 46" between the rear inner tires (double check you have that amount of space between the center of the rear inner tires). We can make it narrower if need be.
  • Real life flow testing confirms diffuser's ability to maintain a very good boundary layer
  • Extends from the rear A-arms backward
  • CNC (Computer Numerical Control) Precision Laser Cut
  • Made of very high quality 14 gauge (0.06") 5052 aluminum
  • Mounted to the rear subframe + rear bumper support via supplied bracket
  • NO drilling required
  • Does not fit the stock exhaust, must modify exhaust or make hole in diffuser
  • Raw Aluminum or Powder Coated Semi-Gloss Black!
  • Supplied with all hardware and mounting brackets
  • Made in the USA  
  • Nearby and want to pick it up? COME ON BY
  • PLEASE allow a 20-28 business day build time - it's worth it
  • We recommend further flattening the underside of your Miata for even better results. We plan on producing panels to do just so in the future.

Feel free to contact us if you have any questions or for Alaska/Hawaii/international shipping.