APR Performance SS/GT Widebody Aerodynamic Kit 2004-2005 WRX / 2004-2005 STI | 80mm Stance Increase | Widebody Aero Kit

Overview

The APR Performance SS/GT Widebody Aerodynamic Kit is designed specifically for the 2004-2005 Subaru WRX and WRX STI models, offering a significant upgrade in both traction and visual presence. This built-to-order kit expands the vehicle's body stance by 3.15 inches (80mm), allowing owners to fit wider 18-inch wheels with tire widths up to 295mm. This wider footprint enhances grip and stability, especially beneficial for enthusiasts seeking improved handling and cornering performance on both street and track.

Engineered with precision, the SS/GT kit combines functional aerodynamic components with aggressive styling. The kit includes widebody front and rear bumpers, fenders with integrated brake and oil cooler vents, and side skirts that maintain a cohesive design language. Carbon fiber elements such as the front wind splitter and undertray contribute to aerodynamic efficiency, while detachable canards enable fine-tuning of front downforce. APR’s approach balances form and function, delivering a purposeful upgrade that complements Subaru’s rally heritage.

For Subaru owners, this widebody kit not only transforms the vehicle’s stance but also improves aerodynamic stability at higher speeds. The increased track width and aerodynamic aids reduce lift and enhance traction, making it easier to exploit the WRX and STI’s performance potential. While the kit does not include the Formula GT3 mirrors or the rear GTC-300 WRX Spec wing, these components are available separately for further aerodynamic refinement. This kit is ideal for enthusiasts looking to combine aggressive styling with meaningful performance gains.

Features & Specifications

This APR Performance SS/GT Widebody Aerodynamic Kit is engineered for 2004-2005 Subaru WRX and WRX STI models and features an 80mm increase in overall body stance. Constructed from high-quality materials including carbon fiber and durable composites, it delivers enhanced traction and aerodynamic efficiency for Subaru enthusiasts seeking wider wheel fitment and improved stability.

• Brand: APR
• Product: SS/GT Widebody Aerodynamic Kit
• Part Number: AB-820500
• Fitment: 2004-2005 Subaru WRX, 2004-2005 Subaru WRX STI
• Material: Carbon Fiber (splitter, undertray), Composite (body panels)
• Finish: Unpainted (ready for custom paint)
• Construction: Molded composite panels with carbon fiber aerodynamic components
• Origin: Made to order, lead time 4-6 weeks
• Stance Increase: 80mm (3.15 inches) wider body
• Wheel Fitment: Supports 18" wheels, 10-11" width, tires up to 295mm
• Included Aero Components: Front wind splitter, undertray, widebody bumpers, fenders, side skirts
• Additional Aero Options: Rear carbon fiber diffuser and GTC-300 WRX Spec wing sold separately

Key Benefits

• Performance: Wider track and aerodynamic aids improve traction and high-speed stability
• Fitment: Designed specifically for 2004-2005 WRX and STI for precise OEM+ integration
• Aesthetics: Aggressive widebody stance enhances visual presence without compromising Subaru styling cues
• Adjustability: Detachable carbon fiber canards allow front aerodynamic tuning
• Quality: Carbon fiber and molded composites ensure lightweight durability and premium finish potential
• Customization: Unpainted panels ready for professional paint matching to your vehicle

What's Included

• 1× APR Widebody Front Bumper with Brake/Oil Cooler Vents
• 1× Carbon Fiber Front Wind Splitter and Undertray
• 1× Widebody Front Fenders (40mm) with Wheel Turbulence Exhaust Ports
• 1× Widebody Side Skirts
• 1× Widebody Rear Door, Gas Door, and Fender Combination (40mm)
• 1× Widebody Drag Reduction Rear Bumper
• Installation instructions (recommended professional installation)

Installation & Compatibility

Installation of the APR SS/GT Widebody Aerodynamic Kit is a moderate to advanced project best suited for professional body shops or experienced enthusiasts with access to proper tools. The kit requires precise alignment and may involve trimming or modification of existing panels to ensure seamless integration. Painting is necessary as the components come unpainted. This kit is a built-to-order product with a lead time of 4-6 weeks, so planning ahead is essential.

• Professional Installation: Recommended
• Modifications Required: Minor trimming and paint preparation
• Verify Compatibility: Confirm fitment for 2004-2005 Subaru WRX and WRX STI models only

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