Mercedes-Benz GLC63 Catless Downpipes — M177 4.0L Twin-Turbo V8
YPG Motorsport catless downpipes for the Mercedes-AMG GLC63 and GLC63 S (X253 / C253) replace the restrictive factory catalytic converters with mandrel-bent stainless steel pipes. The GLC63 shares the M177 4.0L twin-turbo V8 with the C63 and E63 — and the same tuning potential. Removing the factory cats is the single biggest bolt-on power gain available on this platform.
When paired with a Stage 2 ECU calibration, the GLC63 S delivers 650–700 HP and 700–750 lb-ft of torque — transforming the SUV into one of the fastest vehicles in its segment. The all-wheel-drive system hooks everything. For Stage 3 turbo builds targeting 850+ HP, downpipes are a mandatory prerequisite.
Compatibility
- 2017–2022 Mercedes-AMG GLC63 (X253 SUV)
- 2017–2022 Mercedes-AMG GLC63 S (X253 SUV)
- 2017–2022 Mercedes-AMG GLC63 / GLC63 S (C253 Coupe)
- M177 4.0L Twin-Turbo V8 — all variants (476 HP base / 510 HP S model)
Key Specifications
- Material: Low-carbon 304 stainless steel
- Construction: TIG welded, hand finished
- Flanges: CNC-machined 304 stainless — OEM mounting points
- Fitment: Direct OEM replacement — bolt-on, no fabrication required
- Origin: Made in Germany
- Warranty: Lifetime
What's Included
- 1× pair stainless steel catless downpipes
- All necessary bolts, gaskets, and clamps
Installation
Professional installation recommended. A Stage 2 ECU calibration is required to eliminate the CEL and unlock the full power gains. YPG Motorsport offers remote ECU flashing worldwide — OBD2 tool shipped to your door, guided session, 30–45 minutes, fully reversible to stock.
Why YPG Motorsport
YPG Motorsport has been building and tuning AMG M177 engines since the platform launched — including the world record sub-10-second W205 C63 quarter mile. The GLC63 uses the identical engine and responds to the same modification path. Ships worldwide with free delivery. GCC stock available for same-week dispatch to Kuwait, Saudi Arabia, UAE, Qatar, Bahrain, and Oman.
⚠ MOTORSPORT USE ONLY — LEGAL DISCLAIMER
This product is sold for motorsport, off-road, and competition use only. It is not legal for use on vehicles operated on public highways in jurisdictions where emissions equipment removal is prohibited. The buyer assumes full responsibility for compliance with all applicable local, state, and federal laws.
These downpipes are the hardware prerequisite for Stage 2 power. Pair them with the matching ECU tune to extract the full gains.
View Stage 2 Tune →
