Toyota A90 MK5 Supra Catless Downpipe

Toyota A90 MK5 Supra 3.0T B58 Catless Downpipe

Unlock the true performance potential of your Toyota GR Supra with this High-Performance Catless Downpipe, engineered to maximise exhaust flow, reduce turbocharger back pressure, and deliver substantial improvements in power, throttle response, and exhaust sound.

Designed specifically for the Toyota A90/A91 MK5 Supra equipped with the BMW B58 3.0L turbocharged engine, this direct bolt-on downpipe replaces the highly restrictive factory catalytic converter with a free-flowing mandrel-bent stainless steel design. By significantly reducing exhaust restriction, the turbocharger can spool faster and operate more efficiently, resulting in increased horsepower, torque, and a much more aggressive exhaust note.

Manufactured from premium T304 stainless steel with precision TIG welding and CNC-machined flanges, this downpipe is built to withstand extreme temperatures while ensuring excellent durability, corrosion resistance, and an OEM-quality fit.

Whether you're running a completely stock vehicle or building a high-performance Stage 2 setup, this Catless Downpipe is one of the most effective bolt-on performance upgrades available for the B58-powered Supra.

Key Features

Free-Flowing Catless Design

Eliminates the restrictive factory catalytic converter to maximise exhaust gas flow and significantly reduce back pressure.

Increased Performance

Improves turbocharger efficiency for faster spool, increased horsepower, stronger torque delivery, and improved throttle response.

Premium T304 Stainless Steel Construction

Manufactured from high-quality T304 stainless steel for exceptional strength, heat resistance, and corrosion protection.

Precision TIG Welded

Professionally TIG welded to ensure maximum durability and long-term reliability under demanding driving conditions.

CNC Machined Flanges

Precision-machined flanges provide an accurate OEM-style fitment and reliable sealing.

Direct Bolt-On Installation

Designed as a direct replacement for the factory downpipe using the original mounting locations and factory oxygen sensor positions.

Performance Benefits

Increased Horsepower & Torque

Reducing exhaust restriction allows the turbocharger to operate more efficiently, providing noticeable power gains, particularly when combined with ECU tuning. Gains of around 20–25 horsepower with supporting tuning are commonly reported for quality B58 downpipes.

Faster Turbo Spool

Lower exhaust back pressure allows the turbocharger to spool more quickly, improving acceleration and throttle response.

Aggressive Exhaust Sound

Produces a significantly louder, deeper exhaust note with enhanced turbo whistle, sharper crackles, and a more aggressive overall tone compared to the factory downpipe.

Sound Characteristics

Compared to the factory downpipe, this catless system delivers:

• Noticeably louder exhaust volume

• More pronounced turbo spool and induction noise

• Sharper pops and crackles (vehicle tune dependent)

• Deeper, more aggressive exhaust tone

• Increased exhaust presence throughout the RPM range

Vehicle Fitment

Toyota GR Supra A90 3.0L (2020+)
Toyota GR Supra A91 3.0L (2021+)

Engine: BMW B58 3.0L Turbocharged Inline-6

Please Note

• Professional installation is strongly recommended.

• ECU tuning is highly recommended to maximise performance.

• Installation of a catless downpipe may trigger a Check Engine Light (CEL) depending on the vehicle's ECU calibration.

• This product is intended for off-road, racing, or motorsport use where permitted by local regulations.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles — including Volkswagen GTI & R models, Audi S/RS platforms, and BMW M vehicles. Every product we offer is carefully selected for its quality, fitment, and real-world performance — tested by enthusiasts, for enthusiasts.