Sequential Racing 4.5” Catless Downpipe – Toyota GR Supra A90/A91 B58

Unlock maximum performance from your Toyota GR Supra with the Sequential Racing 4.5” Catless Downpipe, engineered for enthusiasts seeking the ultimate in power, turbo response, and sound. Designed as a direct OEM replacement, this high-flow downpipe removes the restrictive factory catalytic converter, dramatically improving exhaust flow and overall engine efficiency.

Built with performance and reliability in mind, the large 4.5-inch diameter piping reduces back pressure, allowing the turbocharger to spool faster and operate more efficiently. The result is sharper throttle response, increased power potential, and a cleaner, more pronounced turbo sound without excessive rasp.

Key Features

• Sequential Racing 4.5” catless downpipe for B58 Supra
• Large diameter piping for maximum exhaust flow
• Reduces back pressure for improved turbo efficiency
• Enhances turbo spool and throttle response
• Engineered for cleaner, less raspy exhaust tone
• Improves turbo whistle and overall sound profile
• Direct OEM replacement fitment
• High-quality stainless steel construction for durability
• Includes 3-ply silicone couplers for secure, heat-resistant connections

Performance & Sound

The factory downpipe is one of the most restrictive components in the exhaust system. Upgrading to the Sequential Racing catless downpipe delivers noticeable performance gains.

• Faster turbo spool and improved boost response
• Increased horsepower and torque potential when tuned
• More aggressive exhaust tone with reduced rasp
• Enhanced turbo sound and driving experience

For best results, pair with the Sequential Racing Charge Pipe to further improve airflow and reliability.

Installation

• Direct bolt-on design using factory mounting points
• Moderate installation complexity

Professional installation is highly recommended

Installation is available at Sequential Racing – Altona North, Melbourne
To organise installation, contact: sales@sequentialracing.com.au

Vehicle Fitment

• Toyota GR Supra A90 (MK5) – 2019+
• Toyota GR Supra A91 – 2020+

Engine: B58 3.0L Turbo

What’s Included

• Sequential Racing 4.5” Catless Downpipe
• 3-Ply Silicone Couplers

Important Notes

• This is a catless (race) downpipe intended for off-road or motorsport use only
• A check engine light (CEL) will likely occur after installation
• ECU tuning is required to remove CEL and optimise performance
• Not emissions compliant for road use in many regions

Why Choose Sequential Racing?

Sequential Racing develops performance-driven upgrades specifically for the GR Supra platform. This 4.5” catless downpipe is designed to deliver maximum flow, improved turbo efficiency, and a refined aggressive sound.

• Optimised for performance-focused builds
• High-quality materials for long-term durability
• Designed to reduce rasp while enhancing turbo sound

Upgrade your Toyota GR Supra A90/A91 with the Sequential Racing 4.5” Catless Downpipe and experience faster spool, increased power, and a more aggressive driving feel.