$900.00
Wake up the full power and sound of your twin-turbo V8 with the Untd. Performance Catless Downpipe for the Mercedes-Benz GLC63 AMG. Designed for the M177 4.0L engine, this no-compromise performance upgrade removes the factory catalytic converters, significantly improving exhaust flow, turbo efficiency, and overall engine response—while delivering the raw, aggressive exhaust note that the factory setup hides.
Available on backorder
Wake up the full power and sound of your twin-turbo V8 with the Untd. Performance Catless Downpipe for the Mercedes-Benz GLC63 AMG. Designed for the M177 4.0L engine, this no-compromise performance upgrade removes the factory catalytic converters, significantly improving exhaust flow, turbo efficiency, and overall engine response—while delivering the raw, aggressive exhaust note that the factory setup hides.
Catless, Free-Flowing Design
This downpipe eliminates the restrictive OEM catalytic converters to dramatically reduce backpressure and heat retention. The result is faster turbo spool, improved throttle response, and power gains you can feel—especially when paired with ECU tuning and supporting mods.
Unfiltered AMG Sound
Let your GLC63 roar. With the cats removed, the M177’s deep, muscular tone is fully unleashed. Expect louder cold starts, sharper crackles, more audible turbo whistle, and a pronounced exhaust note that transforms your SUV into a high-performance beast.
Built to Handle Power
Crafted from high-grade 304 stainless steel with TIG welds and CNC-machined flanges, this downpipe is made for high-boost, high-heat conditions. Whether you’re street driving or track testing, it’s built to perform reliably and consistently.
OEM-Quality Fitment
Direct bolt-on installation to factory turbos and exhaust systems—no cutting, welding, or modifications required. Fully compatible with stock and most aftermarket exhaust setups.
Track-Tested Performance
Ideal for high-performance and motorsport applications. Whether you’re pushing your GLC63 to new limits or optimizing your tuned setup, this downpipe delivers the airflow needed for serious horsepower and torque increases.
Mercedes-Benz GLC63 AMG / GLC63 S AMG (X253 / C253) – M177 4.0L Bi-Turbo V8
(Fits both SUV and Coupe body styles)
The Untd. Performance Catless Downpipe is the perfect first step toward transforming your GLC63 into a louder, faster, and more thrilling machine. More flow, more sound, more power—exactly what your AMG was built for.
Note: For off-road and race use only. Not emissions-compliant in all areas. Please verify local laws before installation.
