Diffusers & Vortex Generators

Vortex generators benefit cars that have rear wings because it keeps the air flow hitting the top of the rear spoiler for optimal downforce.

Diffusers & Vortex Generators

Vortex generators benefit cars that have rear wings because it keeps the air flow hitting the top of the rear spoiler for optimal downforce.

Showing 1 - 11 of 11 items
  • The STI Rear Diffuser came standard on the 06-07 USDM STi. It channels the air underneath the car to help with high speed stability. You can either purchase the diffuser alone if your car already came with one from the factory or you can purchase the additional hardware in order to bolt it onto your vehicle. This is the bracket that allows for installation of the diffuser on 02-07 WRX and STi. Also needed are the 4 bolts and Cusco Rear Subframe bar.

     

    ***MUST BE USED WITH CUSCO LOWER SUBFRAME BRACE***

    Subaru
  • APR Side Rocker Extensions are the next step to help aerodynamically tune the handling of a car. Made of lightweight and durable carbon fiber composites, APR Side Rocker Extensions help reduce lift at high speeds by preventing air at the sides of the car from rolling underneath the car. The reduced lift helps to stabilize the car during high-speed cornering and helps to increase traction for faster lap times.

    Scion
    Subaru
  • APR Rear Bumper Skirts are the final part of the aerodynamic kit. Made of lightweight and durable carbon fiber composites, APR Rear Bumper Skirts help reduce lift at high speeds by preventing air from rolling underneath the car. The reduced lift helps to stabilize the car during high-speed cornering and helps to increase traction for faster lap times.

    Scion
    Subaru
  • These Side Under Spoilers adjusts airflow on the side of the body and thus enhances running stability. Furthermore, it's a common aero part for both the 4-door and 5-door models, which adds a smart touch to the stylish bodyline of the WRX STI. The design and color of this unit matches the already available SUBARU 'Front Under Spoiler' and both of them together create a sportier and leaner silhouette seen from the front through to the side view of the vehicle. These attach to the stock side skirts. 

    These will work on both the sedan and hatch variants.

    Subaru
    $1,120.00
  • Diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air.

    To help channel the high speed air flow coming from underneath the car, diffusers redirects the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear. This encourages a smoother flowing air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings

    Subaru
  • The STI Rear Diffuser came standard on the 06-07 USDM STi. It channels the air underneath the car to help with high speed stability. You can either purchase the diffuser alone if your car already came with one from the factory or you can purchase the additional hardware in order to bolt it onto your vehicle. This is the bracket that allows for installation of the diffuser on 02-07 WRX and STi. Also needed are the 4 bolts and Cusco Rear Subframe bar.

     

    ***MUST BE USED WITH CUSCO LOWER SUBFRAME BRACE***

    Subaru
  • Diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air.

    To help channel the high speed air flow coming from underneath the car, diffusers redirect the high speed air flow to smoothly transition into the low pressure vacuum in the rear. This encourages smoother air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings.

    Scion
    Subaru
  • The STI Rear Diffuser came standard on the 06-07 USDM STi. It channels the air underneath the car to help with high speed stability. You can either purchase the diffuser alone if your car already came with one from the factory or you can purchase the additional hardware in order to bolt it onto your vehicle, such as the Cusco Diffuser Mount and Hardware.

     

    The hardware you will need when installing this on a WRX or 04-05 STI is as follows:
    1x CUSC-672 487 S
    1x CUSC-673 487 A
    4x SUBA-901000365

    The hardware you will need when installing this on a 1998-2008 is as follows:

    1x CUSC-676 487 A

     1x CUSC-676 487 S

    4x SUBA-901000365

    Subaru
  • These are the bolts that mount the JDM STi rear diffuser to the Cusco Rear Subframe brace and mounting brackets.

    4 Pieces are required, price is per bolt.

  • So you’re driving on the road and all of a sudden you see these Subaru’s, and Evo’s with those fin mcthingees on the back of the roof right? What is that?

    This is called a vortex generator. Simply because they generate a vortex of air particularly for aerodynamic reasons.

    Vortex generators benefit cars that have rear wings because it keeps the air flow hitting the top of the rear spoiler for optimal downforce.  It helps the air flow make a smooth transition flowing from the roof and deflecting off the rear spoiler, rather than having the air crash in the low area between your windshield and rear spoiler.

    WRX & STI 2008-2014 Sedan Only!

    Subaru
  • So you’re driving on the road and all of a sudden you see these Subaru’s, and Evo’s with those fin mcthingees on the back of the roof right? What is that?

    This is called a vortex generator. Simply because they generate a vortex of air particularly for aerodynamic reasons.

    Vortex generators benefit cars that have rear wings because it keeps the air flow hitting the top of the rear spoiler for optimal downforce.  It helps the air flow make a smooth transition flowing from the roof and deflecting off the rear spoiler, rather than having the air crash in the low area between your windshield and rear spoiler.

    Subaru
Showing 1 - 11 of 11 items