HKS Sport Exhaust 2002-2007 WRX / 2004-2007 STI | Performance Enhancement | Exhaust System

Overview

The HKS Sport Exhaust for 2002-2007 Subaru WRX and 2004-2007 STI is a high-quality, performance-oriented exhaust system designed specifically for Subaru enthusiasts seeking to unlock more power and improve their driving experience. Crafted to optimize exhaust flow and reduce backpressure, this system enhances both peak horsepower and torque across the RPM range, making it an ideal upgrade for those looking to maximize their vehicle’s potential. Whether you're aiming for increased performance on the street or track, this exhaust delivers a noticeable boost in power and sound, elevating your Subaru’s overall driving dynamics.

Built with a focus on durability and style, the HKS Sport Exhaust features precision engineering and high-grade materials. Its S409 stainless steel construction ensures long-lasting corrosion resistance, while the black coating adds a sleek, aggressive look. The system’s 75mm piping diameter and polished 106mm tip not only improve exhaust flow but also give your Subaru a refined, performance-inspired aesthetic. Designed with a unique muffler shape and internal design, it maintains low-end torque for daily driving while maximizing high-RPM horsepower for spirited driving. This balance of performance and reliability makes it a favorite among Subaru owners who demand quality and consistency from their upgrades.

Features & Specifications

This HKS Sport Exhaust is engineered for Subaru WRX and STI models from 2002 to 2007, featuring a 75mm optimized piping diameter and a polished 106mm tip for an aggressive appearance and improved exhaust flow.

• Brand: HKS
• Product: Sport Exhaust 2002-2007 WRX / 2004-2007 STI
• Part Number: [If available in description]
• Fitment: Subaru WRX (2002-2007), Subaru STI (2004-2007)
• Material: S409 stainless steel
• Finish: Black corrosion protection with polished tip
• Construction: Precision-welded, CNC-machined components
• Origin: Japan

• Power Gains: Increased peak power and wider torque band (specific gains depend on setup)
• Tuning Required: Recommended for optimal performance
• CARB Status: Not CARB compliant

Key Benefits

• Enhanced Performance: Significantly improves exhaust flow, resulting in increased horsepower and torque across the RPM range.
• Durable Construction: Made from high-grade S409 stainless steel with corrosion-resistant coating for long-lasting performance.
• Improved Sound: Delivers a deeper, more aggressive exhaust note that enhances your Subaru’s sporty character.
• OEM+ Aesthetics: Features a polished 106mm tip and sleek black finish for a refined, performance-inspired look.
• Easy Installation: Comes with all necessary gaskets and mounting hardware for straightforward bolt-on fitment.
• Platform-Specific Fitment: Designed specifically for Subaru WRX and STI models from 2002 to 2007, ensuring perfect compatibility.

What's Included

• 1× HKS Sport Exhaust System
• Gaskets and mounting hardware
• Installation instructions

Installation & Compatibility

Installing the HKS Sport Exhaust is a straightforward process for those with basic mechanical skills, but professional installation is recommended to ensure proper fitment and sealing. The system is designed specifically for 2002-2007 Subaru WRX and STI models, guaranteeing a direct bolt-on upgrade without modifications. No tuning is strictly required, but a retune or ECU flash can help maximize power gains and sound characteristics. Always verify your vehicle's specific year and trim to ensure compatibility with this exhaust system.