APR Performance Carbon Fiber Rear Diffuser For Use w/ APR Widebody Kit Bumper 2004-2007 WRX/STI | Carbon Fiber Construction | Aerodynamic Rear Diffuser

Overview

The APR Performance Carbon Fiber Rear Diffuser is designed specifically for Subaru WRX and WRX STI models from 2002 to 2007, engineered to complement the APR Widebody Kit Bumper. This diffuser enhances your vehicle’s aerodynamic efficiency by managing airflow underneath the car, reducing turbulence and promoting downforce. It is ideal for Subaru enthusiasts looking to improve high-speed stability and the overall aerodynamic balance of their widebody setup.

Crafted from lightweight carbon fiber, this diffuser reflects APR’s commitment to precision engineering and motorsport-inspired design. The component is designed to seamlessly integrate with the APR Widebody Kit, ensuring a cohesive aerodynamic package. By smoothing the transition of high-speed air from beneath the car into the low-pressure zone at the rear, it reduces drag and enhances the effectiveness of other aerodynamic elements such as rear wings and spoilers.

For Subaru owners, this diffuser not only elevates the visual appeal with its carbon fiber weave but also delivers tangible performance benefits. Improved airflow management translates to better rear-end grip and stability at speed, which is particularly valuable for spirited driving and track use. This aerodynamic upgrade is a practical addition for those seeking to maximize the potential of their widebody WRX or STI.

Features & Specifications

This APR Performance Carbon Fiber Rear Diffuser is engineered for 2002-2007 Subaru WRX and WRX STI models and features a lightweight carbon fiber construction. Constructed from high-quality carbon fiber, it delivers enhanced aerodynamic efficiency and downforce for Subaru enthusiasts seeking improved high-speed stability and OEM+ fitment with the APR Widebody Kit.

• Brand: APR
• Product: Performance Carbon Fiber Rear Diffuser For Use w/ APR Widebody Kit Bumper
• Part Number: AB-820620
• Fitment: 2002-2003 WRX, 2004-2005 STI, 2004-2005 WRX, 2006-2007 STI, 2006-2007 WRX
• Material: Carbon Fiber
• Finish: Clear-coated carbon weave
• Construction: Molded carbon fiber composite
• Origin: Made in USA
• Surface Finish: Clear-coated for UV protection and gloss
• Mounting: Direct bolt-on with APR Widebody Kit Bumper

Key Benefits

• Aerodynamic Performance: Enhances downforce by smoothing airflow transition under the car, improving rear-end stability at high speeds.
• Lightweight Construction: Carbon fiber reduces weight compared to OEM plastic or fiberglass alternatives, contributing to better handling and responsiveness.
• OEM+ Fitment: Designed specifically to integrate with the APR Widebody Kit Bumper for a seamless, factory-quality appearance.
• Durability: High-quality carbon fiber composite resists cracking and warping under normal driving conditions.
• Visual Appeal: Exposed carbon fiber weave adds a motorsport-inspired aesthetic that complements performance builds.
• Enhanced Aerodynamic Synergy: Works in conjunction with other aerodynamic components like rear wings to maximize overall vehicle downforce.

What's Included

• 1× APR Performance Carbon Fiber Rear Diffuser
• Mounting hardware compatible with APR Widebody Kit Bumper
• Installation instructions

Installation & Compatibility

Installation of the APR Carbon Fiber Rear Diffuser is a direct bolt-on process when used with the APR Widebody Kit Bumper, making it accessible for enthusiasts with moderate mechanical skills. Basic hand tools are sufficient for installation, but professional installation is recommended to ensure precise fitment and alignment. This diffuser is specifically designed for Subaru WRX and WRX STI models from 2002 through 2007 and requires the APR Widebody Kit Bumper for proper mounting. No additional modifications are necessary beyond the widebody kit installation.

• Professional Installation: Recommended for best fitment and finish
• Modifications Required: None when paired with APR Widebody Kit Bumper
• Verify Compatibility: Confirm fitment for your specific year and trim level within 2002-2007 WRX/STI range

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