Subaru Impreza WRX/STI Carbon Fiber Rear Diffuser 2004-2007 (APR Wide Body Only)

The Subaru Impreza WRX/STI Carbon Fiber Rear Diffuser (2004–2007, APR Wide Body Only) by APR Performance is engineered for vehicles equipped with the APR Wide Body Kit, offering optimal aerodynamic performance and precision fitment.

Diffusers play a key role in aerodynamic balance by smoothing and accelerating airflow exiting the underbody. This design reduces rear-end lift by guiding high-speed airflow beneath the car into the low-pressure area behind the vehicle—creating additional downforce and improving stability.

Constructed from prepreg carbon fiber composite using autoclave high-temperature manufacturing, this diffuser combines ultra-lightweight strength with exceptional durability. The UV-protected gloss clear coat maintains a deep, polished finish while protecting the carbon fiber from fading and environmental damage.

Ideal for high-performance builds and track setups, this diffuser complements other APR aerodynamic components to maximize overall vehicle performance and aesthetic appeal.

Key Features

• Prepreg Carbon Fiber Construction – Formed in the autoclave for unmatched strength-to-weight ratio.
• Aerodynamic Optimization – Channels high-speed airflow for smoother rear air transition and reduced drag.
• Increased Downforce – Enhances rear-end stability and complements front aero components for balance.
• APR Wide Body Compatibility – Designed specifically for APR Wide Body-equipped Subaru Impreza WRX/STI models.
• UV-Resistant Gloss Finish – Coated with UV-stable epoxy resin for long-lasting durability and fade resistance.
• APR Performance Engineering – Developed for maximum aerodynamic efficiency and race-proven performance.

Specifications

• Material: Prepreg Carbon Fiber Composite
• Finish: UV-Protected Gloss Clear Coat
• Includes: Rear Diffuser, Mounting Hardware
• Installation: Professional installation recommended
• Brand: APR Performance
• Category: Aerodynamics / Exterior

Fitment

• Subaru Impreza WRX (2004–2007, APR Wide Body Only)