KORSH Catless Downpipe

KORSH Catless Downpipe – Subaru WRX / STI (GD/GG)

The KORSH Maximum Performance Catless Downpipe is engineered specifically for the Subaru WRX and STI (2001–2007). Designed for track and competition use, this high-performance exhaust component features a full 76mm (3.0") bore to deliver completely unrestricted flow, allowing your turbocharger to spool faster and reach its full power potential.

By utilising a high-quality cast bellmouth head and a true 3-inch (76mm) diameter throughout, this downpipe provides superior internal geometry compared to standard fabricated units. This design reduces turbulence exiting the turbocharger, resulting in maximum throttle response and significant gains in both power and torque across the entire rev range.

Key Features

• Full 76mm (3.0") Bore: Maximises exhaust gas volume and velocity for high-boost applications.
• Cast Bellmouth Head: Features an enlarged internal cavity to optimise exhaust gas transition and improve flow efficiency directly from the turbo turbine.
• Unrestricted Flow: The catless design removes the primary exhaust restriction, making it the ideal choice for high-horsepower and competition-spec engines.
• Mandrel-Bent Tubing: Precision 76mm mandrel-bent stainless steel ensures a consistent diameter is maintained, eliminating any restrictive bottlenecks.
• Global Compatibility: Specifically engineered to clear steering components on both Right-Hand Drive (RHD) and Left-Hand Drive (LHD) vehicles.
• Direct Bolt-On Fitment: Designed as a straightforward replacement for the factory pipework, ensuring a professional and secure fit.

Specifications

• Material: High-grade Stainless Steel
• Diameter: 76mm (3.0")
• Design: Cast Bellmouth with Mandrel-Bent Piping
• Type: Catless / Race-Only
• Fitment: RHD and LHD Compatible

What’s Included

• 1 x KORSH Catless Downpipe
• Installation Hardware and Gaskets

Important: This catless downpipe is designed for off-road, track, and competition use only. Please check your local emissions regulations and state laws before installation as this product is not intended for street use.