HKS Metal Catalyzer Sports Catalytic Convertor Downpipe GR Supra

HKS Metal Catalyzer Sports Cat Downpipe – Toyota GR Supra A90/A91 (2020+)

Unlock more power and improve exhaust flow on your GR Supra with the HKS Metal Catalyzer Downpipe. Featuring a high-performance 150-cell design (vs stock 600-cell), this precision-engineered sports cat reduces exhaust backpressure by 40% while maintaining compliance with WLTC emissions standards.

Made from durable SUS304 stainless steel, the downpipe uses a lost-wax cast outlet for smooth gas flow, ensuring efficient turbo response and dyno-proven gains of +13PS across the rev range. It also delivers a deeper, more refined exhaust note—measured at 89dB with the OEM muffler—without excessive volume.

Key Features & Benefits

• 150-cell high-flow catalytic converter for improved flow
• 40% reduction in exhaust pressure vs stock 600-cell unit
• +13PS power gain (verified in-house by HKS)
• Lost-wax cast outlet for optimal gas flow
• WLTC emissions tested and certified
• Durable SUS304 stainless steel construction
  
• 85mm pipe diameter (front section)
  
• Enhanced sound: 89dB vs 84dB stock with OEM muffler
  
• No CEL when used with stock ECU and compatible setups

Vehicle Fitment
• Toyota GR Supra A90 / A91 (2020+)
• Compatible with 3.0L B58 turbocharged engine
• Works with OEM and most aftermarket cat-back systems

Includes
• HKS Metal Catalyzer Downpipe assembly
• Gaskets and installation hardware
• Emissions test certificate
• Full installation instructions

Engineered by HKS for performance and compliance, this is the ultimate downpipe upgrade for GR Supra drivers who want real-world gains without compromising emissions legality.