Skip to product information

APR Performance

Carbon Fiber Rear Diffuser

Fits: 02-07 WRX/STI

Profile Avatar

Talk to an Enthusiast

Verify Fitment & Product Recommendations

M-F 9:00AM - 6:00PM

Ships When Available-Lead Time Applies

Pay over time available · Est. $31.44/payment
ⓘ

Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

Pay over time available · Est. $31.44/payment
ⓘ

Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

APR Performance Carbon Fiber Rear Diffuser
Fits: 02-07 WRX/STI

Fitment

Please Note: APR lists 2002-2007 Subaru Impreza WRX/STI STI mapped to live 2004-2007 WRX STI bucket (US STI from 2004)
  • 2004-2007 Subaru | WRX STI
  • 2002–2007 Subaru | WRX

Description

APR Performance Carbon Fiber Rear Diffuser - 2002-2007 Subaru Impreza WRX/STI (AB-820519)

Per APR Performance, diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. As a car moves forward, the air behind it is disrupted, creating a vacuum of low-pressure air. A diffuser channels the high-speed airflow coming from underneath the car so it transitions smoothly into that low-pressure area at the rear. This encourages smoother airflow underneath the car and allows better performance from other aerodynamic components such as wings.

Features (per APR Performance)

  • Pre-preg carbon fiber formed in an autoclave at high temperature for high strength and low weight
  • UV-resistant coating (per APR)

Fitment (per APR Performance)

  • 2002-2007 Subaru Impreza WRX/STI

Q: Which vehicles does it fit?
A: APR Performance lists the 2002-2007 Subaru Impreza WRX/STI.

Q: What does it do?
A: Per APR, it works with other aero parts to smooth airflow exiting from under the car.

Q: What is it made of?
A: Pre-preg carbon fiber with a UV-resistant coating, per APR.

Q: Is there a version for the APR wide body?
A: APR sells a separate 2004-2007 diffuser for the APR wide body (AB-820620).

Shipping and Delivery

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Warranty and Support

For APR Performance warranty information, contact our support team.

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

Proposition 65

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov