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This Untd. Performance Braided flex downpipe features 3″ tapered to 2.5″ piping to achieve horsepower gains across the entire RPM range on 2.7L Audi S4/RS4 (B5) and A6/Allroad (C5). Catalytic converter is removed to eliminate restrictions on exhaust flow.
The unique hybrid design of the inlet flanges enables direct bolt-on for stock K03 turbo, upgrade K04 turbo and custom built RS6 turbo. -
Boost power, throttle response, and exhaust flow on your VW Golf GTI or GLI MK7/MK7.5 with the Untd. Performance 3.5” 200 Cell High-Flow Catted Downpipe. Designed for the EA888 Gen 3 2.0T engine, this premium stainless-steel downpipe improves turbo spool, deepens exhaust tone, and delivers significant performance gains — all with a direct bolt-on fit and emissions-friendly 200-cell catalyst. Perfect for tuned and performance-focused builds.
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Maximize the performance of your Mercedes-Benz C63 AMG with the Untd. Performance 3.5″ Catless Downpipe. Engineered for the M177 4.0L Bi-Turbo V8, this catless downpipe is designed to eliminate the restrictive factory catalytic converters, allowing for improved exhaust flow and reduced backpressure. With the larger 3.5″ diameter, this downpipe ensures optimal turbo efficiency, quicker spool times, and a massive increase in horsepower and torque—transforming your W205 C63 AMG into a track-ready performance machine.
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Unlock the full power potential of your Mercedes-Benz C63 AMG with the Untd. Performance 3.5″ Catless Downpipe with Shield. Specifically designed for the w205 M177 4.0L Bi-Turbo V8 engine, this high-performance downpipe eliminates the restrictive factory catalytic converters, allowing for increased exhaust flow, reduced backpressure, and quicker turbo spool. Paired with integrated heat shielding, this downpipe delivers not only improved performance but also enhances the driving experience with a more aggressive exhaust note and optimal engine temperatures.
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- Full stainless steel 304 material pipes
- Laser CNC cut head and exhaust flanges
- CNC cut three into one, precision slip fit collectors
- Mandrel bends
- Fully TIG welded
- Direct Bolt on to the left hand drive B8 3.0T S4 and S5
- Perfect fitment with both the factory and all cat back exhaust systems
ONLY FOR 3.0T TFSI SUPERCHARGED ENGINE
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Elevate the performance of your BMW M240i, M340i, M440i, or X5 40i xDrive with the Untd. Performance 4.5″ Catless Downpipe. Designed for the powerful B58 3.0L I6 turbo engine, this high-flow catless downpipe replaces the restrictive factory catalytic converters, significantly improving exhaust flow and turbocharger efficiency. The result is a marked increase in horsepower, faster turbo spool, enhanced throttle response, and a deeper, more aggressive exhaust note, making it the perfect upgrade for your BMW.
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Unlock the true performance potential of your BMW M240i, M340i, M440i, or 540i/740i xDrive with the Untd. Performance 4.5″ Catless Downpipe. Designed for the B58 3.0L I6 turbo engine, this high-flow catless downpipe removes restrictive factory catalytic converters to improve exhaust flow, reduce backpressure, and enhance turbo efficiency. The result? Increased horsepower, quicker turbo spool, improved throttle response, and a more aggressive exhaust sound, making it the perfect performance upgrade for your F3X BMW.
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The Untd. Performance Air Cooler / Intercooler Kit for the Audi B9 RS4/RS5 2.9T EA839 is engineered for maximum cooling efficiency and reliability under high boost conditions. Featuring a high-capacity core and optimized flow design, it reduces intake air temperatures to maintain consistent power delivery. Built with premium materials for durability, this kit supports both stock and tuned applications. Perfect for enthusiasts seeking improved performance and heat management.
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Tap into the raw performance of Audi’s 3.0T V6 with the Untd. Performance Catless Downpipe. Designed to free your exhaust from restrictive factory cats, this system sharpens throttle response, improves turbo efficiency, and unleashes a more aggressive exhaust note. Built from motorsport-grade stainless steel, it’s a direct-fit upgrade that transforms both sound and performance.
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Unleash the full potential of your EA839-powered Audi with the Untd. Performance Catless Downpipe for B9 S4, S5, and SQ5. Built to eliminate factory restrictions and maximize exhaust flow, this downpipe transforms your 3.0T V6 into a sharper, harder-pulling performance machine. Expect faster turbo spool, a more aggressive exhaust tone, and real-world power gains—perfect for enthusiasts running tunes, upgraded intakes, or chasing maximum performance on and off the track.
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Unleash hidden power from your turbocharged 2.0L with the Untd. Performance Catless Downpipe for the Mercedes-Benz C300 and E300 (M274). Built for maximum flow and throttle response, this upgrade eliminates the restrictive factory catalytic converter—delivering quicker spool, sharper throttle feel, and an aggressive, turbocharged sound that completely transforms the driving experience.
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Unleash the beast within your 5.5L Bi-Turbo AMG with the Untd. Performance Catless Downpipe, designed to deliver unrestricted flow, rapid turbo response, and an aggressive sound that turns every throttle input into a full-scale experience. Built for the M157 and M278 platforms, this downpipe transforms your E63 or CLS63 into the performance machine it was truly meant to be.
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