HKS Super Turbo Muffler

2004–2007 Subaru Impreza WRX / WRX STI 2.0L / 2.5L

Part #: 31029-AF001

Overview

The HKS Super Turbo Muffler is a high-performance exhaust component designed specifically for Subaru WRX and WRX STI models from 2004 to 2007. Crafted with precision and engineered for enthusiasts who seek a balance of power, sound, and reliability, this 3-inch cat-back exhaust system enhances your vehicle's exhaust flow while maintaining a refined noise level. Whether you're looking to improve your car's performance or achieve a sportier sound, the HKS SSR cat-back exhaust offers a proven solution that complements your Subaru's sporty character.

Built with durability and quality in mind, this stainless steel exhaust system is a direct bolt-on upgrade that fits seamlessly into your vehicle's existing exhaust architecture. Designed for street use, it provides an aggressive yet legal sound profile, producing less than 93 decibels, making it suitable for daily driving and spirited outings alike. With the HKS Super Turbo Muffler, you'll get a noticeable improvement in exhaust flow, which can support increased horsepower and torque, along with a distinctive, deep exhaust note that enhances your driving experience.

Key Features

The HKS SSR Super Turbo Muffler is engineered with several key features that set it apart from standard exhaust components:

• Constructed from high-quality S304 stainless steel, ensuring excellent corrosion resistance and longevity even under harsh driving conditions.
• 3-inch diameter piping optimized for improved exhaust flow, reducing backpressure and supporting performance gains.
• Designed with the iconic SSR (Super Turbo) muffler shape, providing a sporty appearance and distinctive sound profile.
• Maintains legal noise levels (under 93dB), making it suitable for street use without attracting unwanted attention or violating noise regulations.
• Direct bolt-on installation with no modifications required, allowing for easy upgrade and factory fitment.
• Enhanced exhaust note that offers a deeper, more aggressive tone without excessive drone or noise pollution.
• Backed by HKS's reputation for quality and performance, ensuring reliable operation and consistent performance over time.

Construction & Design

The HKS Super Turbo Muffler features a meticulously crafted stainless steel construction, utilizing TIG welding techniques for durability and precision. The 3-inch piping is mandrel-bent to ensure smooth airflow, minimizing turbulence and maximizing exhaust efficiency. The SSR muffler shape is designed not only for aesthetic appeal but also to optimize sound characteristics, delivering a sporty tone that enhances your vehicle's presence on the road. The stainless steel finish resists corrosion and maintains its appearance over years of use, making it a durable upgrade for your Subaru.

Installation & Fitment

The HKS Super Turbo Muffler is designed as a straightforward bolt-on upgrade for your Subaru WRX and WRX STI (2004–2007). It mounts directly to the factory exhaust system using existing mounting points and clamps, requiring no cutting or welding. The installation process is typically simple and can be completed with basic hand tools, making it accessible for both DIY enthusiasts and professional installers. No tuning or additional modifications are necessary, allowing you to enjoy your upgraded exhaust system quickly and easily.

What's Included

• HKS SSR Super Turbo Muffler
• All necessary clamps and hardware for installation
• Installation instructions

Ideal For

• Subaru WRX and WRX STI owners seeking increased performance and a sportier exhaust note
• Enthusiasts looking for a durable, high-quality stainless steel exhaust upgrade
• Drivers who want to maintain legal noise levels while enhancing vehicle sound and flow
• Street and spirited driving applications