TurboXS Turbocharger Down Pipe

TurboXS Turbocharger Down Pipes: Engineered for Maximum Exhaust Flow

When it comes to unlocking the full potential of a turbocharged engine, few upgrades are as impactful as a performance downpipe — and TurboXS has been refining this exact piece of the exhaust puzzle since 1999. As a specialist in forced-induction performance components, TurboXS brings deep engineering expertise to their turbocharger down pipe lineup, producing parts that balance serious flow improvements with quality materials and a focus on real-world fitment.

Cast 304 Stainless Steel Construction

The defining feature of a TurboXS downpipe is its construction philosophy. TurboXS downpipes use a massive cast 304 stainless steel bellmouth that tapers to 3.0" piping where it connects to the mid-pipe. This bellmouth design is not merely cosmetic — it smooths the transition from the turbine housing outlet, reducing exhaust backpressure and helping spent gases exit the turbocharger more efficiently. The result is improved spool response and a broader powerband across the rev range.

The TurboXS downpipe uses a full 4" cast bell mouth section on the turbo side, tapering to a 3" mandrel-bent stainless pipe. Mandrel bending preserves the full interior diameter throughout every curve — a critical advantage over crush-bent alternatives that can create turbulence and restrict flow.

High-Flow Catalytic Converter Integration

TurboXS offers their downpipes in catted configurations, pairing the free-flowing pipe design with a high-flow catalytic converter for enthusiasts who want real performance gains while maintaining emissions-conscious street use. The catalytic converter is removable without having to purchase a whole new downpipe , giving owners flexibility for track or off-road use without sacrificing the investment in the downpipe itself.

Unlike previous designs, the TurboXS downpipe will bolt to any stock or 3-inch aftermarket cat-back exhaust system , making it a genuinely versatile upgrade whether you're building an all-TurboXS exhaust system or integrating it into a mixed setup.

Purpose-Built for the Subaru Performance Community

TurboXS specializes in high-performance automotive parts, particularly focusing on blow-off valves, exhaust systems, intercoolers, and turbochargers, with products catering to popular brands like Subaru, Mazda, Nissan, and Ford. Their downpipe catalog runs deep within the Subaru WRX and STI ecosystem, with specific fitments spanning model years from the early 2000s through to the modern generation. Designing specifically for the aftermarket customer gives TurboXS an advantage over companies who attempt to do this but do not have the experienced staff and overall knowledge that TurboXS has.

For Subaru owners who want to connect a 3-inch aftermarket downpipe to a stock cat-back — or vice versa — TurboXS also offers precision-machined adapter solutions. Crafted from high-quality stainless steel, these adapters offer excellent corrosion resistance and long-lasting durability, and include a stainless steel exhaust gasket to ensure a secure, leak-free connection.

Why Choose TurboXS for Your Downpipe Upgrade?

• Cast 304 SS bellmouth upper section for maximum exhaust gas flow out of the turbocharger
• Mandrel-bent 3" stainless piping for consistent interior diameter throughout
• Removable high-flow catalytic converter for flexible street or track configurations
• Bolt-on fitment compatible with stock and 3-inch aftermarket cat-back systems
• Decades of forced-induction expertise — TurboXS has been manufacturing high-quality performance parts since 1999

Whether you're chasing faster turbo spool, a more aggressive exhaust note, or simply removing a major restriction from your forced-induction system, explore the full turbocharger down pipe category or browse the complete TurboXS product lineup to find the right combination for your build.