SLE GLC63 AMG (M177) 4.0T Catless Downpipes (2018–Present)

SLE GLC63 AMG (M177) 4.0T Catless Downpipes (2018–Present)

The SLE Catless Downpipes are engineered for the Mercedes-AMG GLC63 equipped with the 4.0L Bi-Turbo V8 (M177). By replacing the factory catalytic converters, these downpipes drastically reduce backpressure, improve exhaust flow, and unlock a louder, more aggressive AMG exhaust tone — all while enhancing turbo spool and throttle response.

Constructed from T304 stainless steel, with TIG-welded and back-purged seams, these downpipes are built to handle extreme heat and boost. Perfect for tuned or track-built GLC63s, this upgrade provides OEM-style fitment with aftermarket-level performance.

Product Features

• Catless high-flow design for maximum performance
• For the M177 4.0L Bi-Turbo V8
• T304 stainless steel construction for strength and corrosion resistance
• TIG-welded and back-purged for durability under high temps
• Deep, aggressive exhaust note with improved throttle response
• Direct bolt-on fitment, no modifications required

Vehicle Compatibility

• Mercedes-AMG GLC63 / GLC63 S (X253/C253) – SUV & Coupe (2018–Present)

Disclaimer: This product is intended for OFF-ROAD OR RACING USE ONLY. It is not legal for use on public roads in vehicles subject to emissions regulations. A stage 2 ECU tune is required to prevent a check engine light (CEL).