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- Untd. Performace Catless Downpipe - Audi A3 2.0T TT Mk2 - VW GOLF 2.0T MK5 MK6
- Untd. Performance Catless After Downpipe - Porsche Panamera 971 2.9T 2018
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Upgrade your VW Golf MK4 1.8T with the Untd. Performance Catless Downpipe—engineered to dramatically increase exhaust flow, boost turbo efficiency, and deliver a raw, motorsport-inspired sound. Designed for performance enthusiasts and built to handle the demands of tuned or track-driven setups, this downpipe removes the factory catalytic converter, opening the door to quicker spool, higher power output, and an aggressive exhaust tone that brings your 1.8T to life.
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Unlock raw, unfiltered performance from your Audi S6, RS6, S7, or RS7 (C7 platform) with the Untd. Performance 2.75″ Catless Downpipe. Purpose-built for the twin-turbo 4.0T V8, this downpipe removes the restrictive factory catalytic converters to maximize exhaust flow, unleash horsepower, and transform your driving experience. Whether you’re carving corners or chasing numbers on the dyno, this downpipe delivers the performance, sound, and response you’ve been looking for.
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Unlock the true potential of your Audi S6/RS6 and S7/RS7 C7 with the Untd. Performance 200 Cell 3″ Downpipe + Mid-Pipe. Specifically engineered for the 4.0T twin-turbo V8, this high-performance downpipe and mid-pipe combination provides significant power gains, faster turbo spool, and an aggressive exhaust sound, all while maintaining a level of emissions compliance with the 200-cell high-flow catalytic converters. This premium upgrade improves exhaust flow and reduces backpressure, allowing your V8 engine to breathe more freely, delivering exceptional throttle response and a thrilling driving experience.
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Elevate your driving experience with the Untd. Performance 200 Cell Catted Downpipe, built for the Audi A3 2.0T, TT Mk2, and VW Golf GTI MK5/MK6. Designed for enthusiasts who want noticeable performance gains without sacrificing emissions compliance, this high-flow downpipe replaces the restrictive factory unit with a larger, freer-flowing pipe and an integrated 200 cell high-flow catalytic converter. The result is improved turbo response, increased horsepower, and a refined yet aggressive exhaust note—making this the perfect upgrade for spirited street driving or light track use.
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Enhance the performance and sound of your Mercedes-Benz AMG GLC63 (2018) with the Untd. Performance Catted Downpipe W/Shield. Designed specifically for the M177 4.0L twin-turbocharged V8 engine, this high-performance downpipe features a 200-cell high-flow catalytic converter and an integrated heat shield to significantly improve exhaust flow, reduce backpressure, and increase horsepower and torque. The catted design maintains emissions compliance while still providing substantial performance gains, making this an ideal upgrade for those looking to increase performance without sacrificing the vehicle’s ability to meet emissions regulations.
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Unlock the true potential of your Mercedes-Benz AMG X290 GT43/GT50/GT53, W213 E53, C257 CLS43/CLS53, or W167 GLE53 with the Untd. Performance Catted Downpipe W/Shield. Engineered for the M256 3.0L turbocharged inline-6 engine, this downpipe utilizes a 200-cell high-flow catalytic converter to significantly enhance exhaust flow, reduce backpressure, and increase overall power output. Paired with an integrated heat shield, this downpipe improves turbo efficiency, accelerates turbo spool, and provides a more aggressive exhaust note—all while maintaining emissions compliance.
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For RS owners who want real power without going fully catless, the Untd. Performance 200 Cell Downpipe is the perfect balance of flow, sound, and street-friendly performance. Designed for the twin-turbo 4.0T V8 in the Audi C8 RS6 and RS7, this high-performance downpipe replaces the restrictive factory setup with a premium 200 cell sport catalytic converter—unlocking sharper throttle response, stronger midrange torque, and a deeper, more aggressive tone.
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Elevate the power and presence of your S-Class AMG with the Untd. Performance 200 Cell Downpipe w/ Heat Shield. Engineered for the M177 4.0L twin-turbo V8 in the W222 S63, this downpipe is designed to drastically improve flow, reduce turbo lag, and enhance exhaust tone—while keeping things refined with a high-flow catalytic converter and integrated thermal shielding.
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Strike the perfect balance between performance and drivability with the Untd. Performance 200 Cell High-Flow Catted Downpipe w/ Heat Shield for the Audi C8 RS6 and RS7. Designed for enthusiasts who want serious gains without going fully catless, this downpipe replaces the factory units with ultra-efficient 200 cell high-flow catalytic converters—delivering major improvements in flow, sound, and power while maintaining a more refined tone and improved emissions compatibility.
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Give your Porsche 911 (991.2) 3.0L Twin-Turbo Flat-6 the power, sound, and response it was meant to have with the Untd. Performance 200 Cell High-Flow Downpipe with Integrated Heat Shield. Designed to drastically improve exhaust flow while managing heat and preserving drivability, this premium upgrade unlocks hidden horsepower, sharper throttle response, and an intoxicating exhaust note — all while maintaining emissions-friendly performance.
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- One Piece – 100% Mandrel Bent and TIG welded
- 200 Cell – High Flow Cat
- With Heat Shield
- Constructed of top quality 304 Stainless Steel
- Bolt-on installation
- Includes Gaskets & Bolts
- Improved exhaust note
- Improved exhaust flow
- Increased HP and Torque
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If you’re serious about power, sound, and turbo response, the Untd. Performance 3.5″ Catless Downpipe is the ultimate exhaust upgrade for your Audi RS3 or TTRS 8V. Designed for the EA855 2.5T (DAZA/DNWA) engine, this monster 3.5” catless downpipe is built to remove restriction, reduce backpressure, and give your 5-cylinder the voice — and performance — it truly deserves. Whether you’re pushing Stage 2 or going all-out with a big-turbo setup, this is the foundation of a proper high-boost build.
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