Description
Unlock the true performance potential of your Toyota Supra MKV 3.0L B58 with the Active Autowerke Signature Catted Downpipe. Designed and engineered to reduce exhaust back pressure while maintaining excellent street manners, this premium performance upgrade delivers improved turbo response, increased horsepower, enhanced exhaust flow, and long-term durability.
Toyota and BMW collaborated to create the modern Supra platform utilizing BMW’s highly capable B58 turbocharged inline-six engine. While the factory downpipe provides adequate emissions control, it also creates a restriction that limits exhaust flow and turbocharger efficiency. The Active Autowerke Signature Catted Downpipe addresses this limitation with a large-diameter, high-flow design that allows exhaust gases to evacuate more efficiently, resulting in quicker turbo spool and increased engine performance.
Dyno testing has demonstrated gains of approximately 18 wheel horsepower when paired with the Active Autowerke Signature Exhaust on a stock-tuned vehicle. Additional performance improvements can be achieved when combined with supporting modifications and performance tuning.
Constructed from premium TIG-welded 304 stainless steel with a robust 1.5mm wall thickness, the Signature Downpipe features a massive 4.5-inch diameter primary section that tapers to 3.5 inches through an integrated stainless steel flex joint before transitioning to the factory 80mm exhaust connection. The design maintains optimal exhaust flow without reducing diameter below the OEM specification.
Each downpipe includes a pre-installed turbo flange gasket to simplify installation and help prevent gasket damage during the installation process.
Whether equipped with the Active Aflow catalytic converter or the GESI Ultra High Output catalytic converter, this downpipe provides exceptional flow characteristics while maintaining OBD2 compatibility and helping eliminate catalyst efficiency-related check engine lights.
No performance tune is required for installation and operation.
Performance Benefits
The turbocharger relies on exhaust gas flow to generate boost pressure. Restrictive factory exhaust components can slow turbine response and reduce overall performance. By increasing flow capacity and minimizing exhaust back pressure, the Active Autowerke Signature Catted Downpipe helps:
- Increase horsepower and torque
- Improve turbocharger spool time
- Enhance throttle response
- Reduce exhaust back pressure
- Improve overall engine efficiency
- Maintain daily driving comfort and reliability
- Support high-horsepower performance applications
- Deliver a direct bolt-on installation with no cutting or welding required
Active Aflow Catalytic Converter Benefits
The Active Aflow version incorporates a proprietary 4.5-inch ultra-high-flow catalytic converter engineered to maximize exhaust flow while maintaining emissions compliance requirements in applicable regions.
Benefits include:
- Guaranteed no catalyst efficiency CEL when properly installed
- EPA registered and fully OBD2 compliant
- Rated for applications producing up to 800 horsepower
- Ultra-high-flow 400 CPSI catalyst design
- Full 304 stainless steel construction including substrate
- Proprietary precious metal loading technology
- Reduced emissions compared to catless alternatives
- Improved durability and catalyst longevity
- Operational efficiency within approximately 9 seconds of startup
- Withstands temperatures up to 1500°F
- Suitable for forced induction applications without sacrificing performance
GESI Ultra High Output Catalytic Converter Benefits
The GESI UHO-Series catalytic converter option offers industry-leading emissions performance and high-flow capability for enthusiasts seeking maximum reliability and compliance.
Benefits include:
- No catalyst efficiency CEL under normal operating conditions
- EPA registered and fully OBD2 compliant
- Rated for applications producing between 500 and 850 horsepower
- Ultra-high-flow 400 CPSI catalyst design
- Full 304 stainless steel construction including substrate
- Proprietary GESI precious metal loading technology
- Reduced emissions and improved catalyst efficiency
- Operational efficiency within approximately 9 seconds of startup
- Withstands temperatures up to 1500°F
- Designed for high-performance forced induction applications
- Helps prevent emissions-related fault codes and failed emissions tests
Construction Features
- Massive 4.5-inch stainless steel primary piping
- Tapers to 3.5 inches through integrated flex section
- Maintains OEM-compatible 80mm outlet connection
- TIG-welded 304 stainless steel construction
- 1.5mm wall thickness for exceptional durability
- Cast stainless steel upper V-band flange
- Stainless steel flex joint for stress reduction
- Precision-engineered fitment
- Direct bolt-on installation
- No cutting or welding required
- Includes pre-installed turbo flange gasket
- Manufactured in Miami, Florida
Warranty Information
- 5-Year / 50,000-Mile Warranty on shell and tube ends
- 2-Year / 25,000-Mile Warranty on catalytic converter core
- Warranty applies to the original purchaser only
- Warranty is void if excessive burble settings beyond factory specifications damage the catalytic converter core
Emissions Information
- EPA compliant for OBD2-equipped vehicles (1996 and newer)
- Not legal for use on vehicles registered in California
- Designed to meet applicable EPA emissions standards
- Fully OBD2 compatible
- Helps maintain catalyst efficiency monitoring functionality
Vehicle Fitment
Toyota Supra (A90/A91) – B58 3.0L Turbocharged Models
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- 2020-2026 Toyota Supra MKV A90/A91 (B58 Engine)
Engine Compatibility
- BMW B58 3.0L Turbocharged Inline-6 Engine
Notes
- Fits Toyota Supra MKV A90 and A91 chassis equipped with the B58 engine
- Compatible with OEM exhaust systems
- Direct replacement for the factory downpipe
- No tuning required for installation
- Includes turbo flange gasket pre-installed for simplified installation
- Not compatible with 2.0L four-cylinder Supra models
- Not legal for use on California-registered vehicles due to CARB regulations
