HKS Legamax Premium Exhaust

2007–2014 Subaru Impreza WRX / STI GRB EJ20 Turbo 2.0L

Part #: 31021-AF014

Overview

The HKS Legamax Premium Exhaust is a high-performance exhaust system designed specifically for the Subaru Impreza WRX and STI models equipped with the EJ20 turbocharged engine from 2007 to 2014. Crafted for enthusiasts who seek to enhance their vehicle's power, sound, and aesthetic appeal, this exhaust system offers a perfect blend of durability and performance. Whether you're aiming for improved exhaust flow, a more aggressive tone, or a refined look under the hood, the Legamax Premium delivers on all fronts.

Built with performance-driven drivers in mind, this exhaust system helps support increased horsepower and torque by reducing backpressure and improving exhaust scavenging. Its high-quality construction ensures long-lasting durability, even under spirited driving conditions. The system's refined design not only boosts your vehicle's performance but also elevates its visual appeal with a sleek stainless steel finish.

Key Features

The HKS Legamax Premium Exhaust incorporates several advanced features that make it a top choice for Subaru enthusiasts:

• Constructed from S304 stainless steel, providing excellent corrosion resistance and a premium appearance that withstands the elements and high temperatures.
• Designed with a Titan-shaped RM (Resonated Muffler) for a balanced combination of performance and refined exhaust tone.
• Features dual 90mm tips on each side, offering a bold and aggressive aesthetic that complements the sporty character of the WRX and STI models.
• Mandrel-bent piping ensures smooth exhaust flow, minimizing turbulence and backpressure for improved engine response.
• Engineered for a direct bolt-on installation, making it a straightforward upgrade without the need for cutting or welding.
• Enhanced exhaust flow helps support increased power output and a more aggressive exhaust note, ideal for spirited driving and track days.
• Refined craftsmanship with TIG welding and precise manufacturing standards guarantee durability and a perfect fit.
• Designed specifically for the turbocharged EJ20 engine, ensuring optimal performance and compatibility.
• Offers a deep, sporty exhaust tone that enhances the driving experience without excessive drone or noise.

Construction & Design

The HKS Legamax Premium Exhaust is meticulously crafted from high-grade S304 stainless steel, known for its strength, corrosion resistance, and aesthetic appeal. The exhaust features mandrel-bent tubing that maintains consistent diameter throughout, promoting optimal airflow and reducing turbulence. The resonated muffler design helps achieve a refined yet sporty sound profile, balancing performance with comfort during daily driving.

The Titan-shaped RM muffler is engineered to provide a distinctive appearance while optimizing exhaust flow. TIG welding throughout the system ensures high-quality joints that withstand thermal expansion and vibration, maintaining integrity over time. The dual 90mm tips not only enhance the visual impact but also contribute to a more aggressive exhaust note, emphasizing the vehicle's sporty character.

Installation & Fitment

The HKS Legamax Premium Exhaust is a bolt-on upgrade that requires no cutting, drilling, or complex modifications. It mounts directly to the factory exhaust points, utilizing OEM mounting hardware for a hassle-free installation. The system is designed to fit precisely on the Subaru Impreza WRX and STI GRB models with the EJ20 turbocharged engine from 2007 to 2014, ensuring a secure and seamless fit. Basic hand tools are sufficient for installation, and no tuning is typically required.

• Direct bolt-on installation with factory mounting points
• No cutting, welding, or tuning necessary
• Includes all necessary hardware and clamps for a complete upgrade

What's Included

• HKS Legamax Premium Muffler with dual 90mm tips
• Mandrel-bent exhaust piping
• Clamps and mounting hardware
• Installation instructions

Ideal For

• Subaru Impreza WRX and STI owners seeking a performance exhaust upgrade
• Enthusiasts wanting a deeper, sportier exhaust tone
• Drivers looking to improve exhaust flow and support increased power
• Those who desire a durable, high-quality stainless steel system with a refined appearance