TurboXS Exhaust Manifold Down Pipe

TurboXS Exhaust Manifold Down Pipes: Engineering Where It Counts

For turbocharged performance enthusiasts, few upgrades have as immediate an impact as the downpipe — the critical section of exhaust tubing that routes spent gases directly from the turbocharger outlet to the rest of the exhaust system. TurboXS has built a reputation around getting this piece exactly right, leveraging over two decades of forced-induction expertise to produce downpipes that prioritize flow, durability, and fitment above all else.

Exhaust manifold downpipes are a high-heat, high-stress component — which is why material selection matters so much. TurboXS meets that challenge head-on with their signature approach: cast 304 stainless steel construction. The flagship WRX/STI catted downpipe (model WS08-DPC-V2) features a massive cast 304 stainless steel bellmouth at the turbo outlet that tapers smoothly into full 3-inch piping, maximizing exhaust gas velocity and minimizing turbulence right where backpressure is most harmful to turbo spool.

What Sets TurboXS Downpipes Apart

• Cast 304 SS Bellmouth: The upper turbo-outlet section uses a cast stainless bellmouth design rather than a simple welded flange, promoting maximum exhaust gas flow from the turbocharger outlet.
• Two-Piece Design: The catted downpipe uses a two-piece construction, allowing owners to swap the catalytic converter section independently — the race pipe (WS08-RP-V2) can be fitted without purchasing an entirely new downpipe.
• High-Flow Catalytic Converter: The integrated cat uses a 100-cell-per-inch (100cpi) substrate, dramatically reducing restriction compared to the factory unit while retaining emissions hardware.
• TIG-Welded & Polished Finish: Every weld is TIG-welded and polished to a show-quality standard, speaking to the craftsmanship that goes into each unit.
• Improved Ground Clearance Routing: The revised pipe path on V2 models provides more ground clearance than earlier designs — a practical benefit for lowered cars common in the WRX/STI community.
• Wideband O2 Bung: A spare wideband oxygen sensor bung is included, making the downpipe tuner-ready right out of the box.

Purpose-Built for Subaru WRX & STI

TurboXS has long been deeply focused on the Subaru performance platform. Their downpipe lineup is engineered specifically for the EJ-series and FA-series turbocharged Subaru engines found in the WRX and STI from 2008 onward, ensuring proper fitment without the guesswork that comes with universal parts. Complementary hardware like turbo-to-downpipe gaskets — available in multi-layer steel construction with a stainless fire ring for reliable sealing — rounds out the system for a complete, leak-free installation.

Whether you are building a weekend track car or simply extracting more response from a daily-driven WRX, TurboXS downpipes represent a precisely engineered solution backed by a brand that has been manufacturing quality performance parts since 1999. Explore the full TurboXS brand catalog or browse all exhaust manifold downpipes to find the right fit for your build.