FS Performance Engineering "The Wide One" Rear Diffuser - Mk1 Audi TT (NLA)

Part# FSPEAU001S

Designed for functionality on both the street and race track, the MK1 Audi TT Rear Diffuser will put a smile on your face. Spanning nearly 46" between the rear inner tires FSPE named this diffuser "The Wide One". Given over 2' of under-body flattening and 1' of curvature (at a 2' radius) there is no doubt you'll help improve air flow underneath and from under your rear bumper.

  • Made of very high quality 14 gauge (.065") 5052 aluminum
  • CNC (Computer Numerical Control) Precision Laser Cut
  • Powder coated satin or gloss black - custom colors available, call for details
  • Made in the U.S.A.
  • Supplied with all brackets and hardware
  • NO drilling required
  • Spans nearly 46" between rear inner tires
  • Give a 2' radius curve to create a pressure differential
  • "Flow-viz" testing assures flow is under the diffuser & makes a proper exit
  • Extends from rear bracing to rear of car
  • Please allow for a 2-3 week build time
  • Note: 12/31/18 Update: Pictures reflect prototype, last picture of employee holding diffuser is a final version with the strakes extending the entire length of the diffuser and a cut out for the tow hook. More pictures coming soon.
Installation Instructions (Coming Soon)

  • 1999-2006 Mk1 Audi TT Quattro (with dual exit exhaust)

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