B5 s4 Downpipe for sale are available from various online performance parts retailers and marketplaces like Audib5s4partshop, with options for different turbo configurations (K03, K04, RS6) and materials.
New Downpipes B5 s4 Downpipe for sale
- JHM B5 S4 Stainless Steel Downpipes w/ CATS
- According to the manufacturer’s website jhmotorsports.com, these are for manual transmission cars only and are available with K03, K04, or RS6 turbo flanges. They are built by Tectonics Tuning and include 49-state legal catalytic converters.
- XS Power 3″ Downpipes
- Available through JAE Innovations, these 3-inch downpipes are designed for B5 S4 models with a 6-speed manual transmission and APB engines. Note that denting of the transmission tunnel may be necessary for proper clearance.
- Lostinfab Audi B5 S4 3″ Stainless Steel Downpipes
- These downpipes are handcrafted in the UK from 304 stainless steel and feature V-band connections and a wideband sensor bung for easy tuning. The manufacturer offers a lifetime warranty for the original buyer.
- Techtonics Tuning 2.5″ Turbo Downpipes w/ High Flow Cats
- According to techtonicstuning.com, these downpipes are designed for manual transmission cars with OEM turbos and feature 2.5-inch stainless steel construction with high-flow cats.
- Gravity Performance 2.5″ Exhaust Decat Downpipes
- Made from polished T304 grade stainless steel, these downpipes are designed to improve power and torque across the entire RPM range. They are available with options for silenced or un-silenced setups

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