2008-2014 Subaru STi Sedan Widebody kit


Available in stock

Quick Overview

2008-2014 Subaru STi Sedan Wide Body kit by MntRider Designs. The best quality wide body kits built for Subaru’s. Take your Subaru to the next level!


2008-2014 Subaru STi Sedan Widebody Kit built by MntRider Design, these Subaru wide body kits are made with our patent fiberglass and polymere weave material. Our gives the product the same strength and weight as carbon fiber, they are not only designed for looks but also for aero dynamics. You will not find another Subaru wide body kit on the market that will match our material and specifications.


Wheel Specs:

18 x 12 + 6

MntRider Designs kit comes with:

  • Two Front Bumper Flares
  • Two Front Fender Flares
  • Two Rear Door Flares
  • Two Rear Fender Flares
  • Two Rear Bumper Flares

This kit adds about 4 inches per corner on the car.

If you are looking to get a new look for your car or be able to run wider tires for your track/street car, then this is for you.

Professional Installation is Recommended

You will be able to let the car run a wheel wider than 18×12+6 with a 295/30R18 tire or wider.


  • Body Panel kits in Carbon Fiber (coming soon)
  • Front Lip in Carbon Fiber or Fiber Reinforced Plastic (FRP)
  • Rear Deck Lip in Carbon Fiber or Fiber Reinforced Plastic (FRP)
  • Aluminum Rear Diffuser

(Additional Options)

  • Air Ride suspension kits available. (coming soon)


The 2015 Rear Diffuser is 100% Direct bolt on.

No  holes to drill, secured with included mounting brackets and bolts. 


  • Aluminum Construction
  • Durable Powder Coat Finish
  • 100% Direct Bolt on
  • Install time of only 20 minutes
  • Laser Engraved Logo on each outside fin.


Additional information

Weight 100 lbs