Injen Cat-Back Exhaust System

2020–2021 Toyota GR Supra 3.0L Turbo Inline-6

SES2300CF

Overview:

The Injen SS Cat-Back Exhaust System is engineered specifically for the 2020 to 2021 Toyota GR Supra equipped with the 3.0L turbocharged inline-6 engine. Designed for enthusiasts seeking a perfect balance of enhanced performance, aggressive sound, and effortless installation, this exhaust system delivers a noticeable upgrade over the factory setup. With a focus on maintaining drivability and sound quality throughout the entire rev range, the Injen SS Cat-Back is ideal for drivers who want to improve throttle response and reduce turbo lag without compromising daily usability.

Whether you are upgrading your Supra for spirited street driving or track days, this exhaust system offers a refined yet race-inspired tone and increased power output, making it a compelling choice for performance-minded owners.

Key Features:

The Injen SS Cat-Back Exhaust incorporates advanced engineering and premium materials to maximize performance and sound quality. Key features include:

• Integrated exhaust valve allowing seamless switching between quiet normal mode and aggressive sport mode
• Dual oval, straight-through mufflers designed for exceptional sound clarity and power delivery
• Oversized mandrel-bent 304 stainless steel tubing to reduce flow restriction and increase airflow
• Custom investment cast Y-pipe that equalizes exhaust flow for improved performance and balanced sound
• Performance stepped piping design that maintains consistent flow velocity throughout the system
• Massive 3.50-inch diameter tubing in the front and mid-sections for maximum flow
• Rear section utilizes 3.00-inch tubing for optimal exhaust scavenging
• Dual 4.5-inch bolt-on carbon fiber exhaust tips for a premium appearance and enhanced exhaust exit
• V-band clamps and flanges for a secure, leak-free connection and simplified installation
• Handcrafted and TIG welded for strength, durability, and precise fitment

Construction & Design:

Manufactured in Pomona, California, the Injen SS Cat-Back Exhaust is built from high-grade 304 stainless steel, known for its corrosion resistance and long-lasting durability. The tubing is mandrel-bent to maintain smooth internal flow paths, minimizing turbulence and maximizing exhaust velocity. The system’s stepped piping design ensures consistent flow rates, which not only improves performance but also preserves the exhaust note as intended by Injen’s engineers.

The exhaust valve is integrated into the system and operates using the factory motor (not included), allowing the driver to toggle between a quiet cruising mode and a more aggressive, race-inspired sound. The dual oval mufflers feature a straight-through design that balances sound attenuation with power gains, delivering a refined yet aggressive exhaust tone.

Performance & Sound

Dyno testing has proven that the Injen SS Cat-Back Exhaust adds an impressive 11 horsepower and 9 lb-ft of torque at the wheels, enhancing throttle response and reducing turbo lag. The exhaust valve system allows for a versatile sound profile, providing a quiet, comfortable tone during normal driving and an exhilarating, race-inspired roar when in sport mode. This makes it an excellent upgrade for drivers who want both daily drivability and track-ready performance.

Installation & Fitment:

The Injen SS Cat-Back Exhaust is designed for a straightforward, bolt-on installation with no cutting, drilling, or vehicle modifications required. It utilizes all factory mounting points and includes factory-style hangers to ensure a secure and precise fit. The inclusion of V-band clamps and flanges simplifies the assembly process, allowing for a quick, leak-free installation that can be completed with basic hand tools.

What's Included:

• Injen SS Cat-Back Exhaust system (front, mid, and rear sections)
• Dual 4.5-inch carbon fiber bolt-on exhaust tips
• Custom investment cast Y-pipe
• V-band clamps and flanges for secure connections
• Factory-style hangers and all necessary mounting hardware
• Integrated exhaust valve assembly (valve motor not included)

Ideal For:

This exhaust system is perfect for Toyota GR Supra owners who want to enhance their vehicle’s performance and sound without sacrificing daily drivability or requiring complex installation. It suits enthusiasts looking for a high-quality, durable exhaust upgrade that delivers measurable power gains, improved throttle response, and a dynamic exhaust note that can be tailored to driving conditions.

Emissions Note

This product is not an emissions-related part and can be used on emission-controlled vehicles without a CARB Executive Order (EO) number. However, customers should verify local regulations before installation.

Injen is a performance intake and airflow brand best known for dyno-proven cold air intakes and intake systems built for enthusiast street and track builds. Their catalog spans intake kits, filters, and supporting components designed to increase airflow, sharpen throttle response, and add a more aggressive induction note.