Description

Engineer enhanced side-body aerodynamics and driving stability into your WRX S4 with the authentic STI side under spoiler. As a key component of the STI aero system, it actively manages airflow along the vehicle’s sides to reduce lift and improve high-speed composure.

Product Highlights

• Functional Side Aerodynamics: This spoiler is engineered to regulate the air flowing from the front to the side of the body, smoothing its path and improving driving stability. Crucially, it also directs air flowing under the body rearward, counteracting the tendency for it to push the rear of the vehicle upward at speed.

• Integrated STI Aero System Component: It is designed to work in unison with the STI front under spoiler and rear aero components, forming a complete aerodynamic management system that functions as a cohesive whole for maximum performance benefit.

• Bespoke Performance Color Choice:

  • Crystal Black Silica: For a stealthy, technical look that emphasizes form.

  • Cherry Red: For a bold, high-visibility statement that highlights the aerodynamic componentry and STI heritage.

Technical Specifications & Critical Warnings

• Product Name: STI Side Under Spoiler for Subaru WRX S4

• Key Benefits: Functional Side Airflow Management, Integrated STI System Part, Black or Red Finish

• Material & Finish: Resin, painted in Crystal Black Silica or Cherry Red.

• Warranty: Covered by the SUBARU genuine parts warranty.

⚠️ Critical Compatibility, Safety & Usage Warnings:

• Exclusive Installation: Cannot be installed together with Side Strakes or Aero Splash parts. You must choose between the functional STI system or the aesthetic/protective trim pieces.

• Significant Ground Clearance Reduction: Lowers ground clearance by approximately 25mm. This requires increased vigilance on uneven surfaces to avoid scraping and damage.

• Serious Safety Hazard – Foot Trap: Please take extra care as this product makes it easier for your feet to get caught when installed. Its protruding design along the lower rocker panel creates a significant tripping hazard when entering or exiting the vehicle. This is a major safety consideration for daily use.