Mercedes-AMG GLC63 / GLC63 S X253 Valved Exhaust System (2017-2022)

Which valved exhaust for a Mercedes-AMG GLC63 or GLC63 S X253?

The Rog system for the Mercedes-AMG GLC63 and GLC63 S X253 is a valved cat-back exhaust in 304 stainless steel or titanium, built to your VIN for the 476 or 510 hp twin-turbo M177 V8: the same system serves both versions. Valves open, the V8's deep rumble returns; closed, the GLC keeps the comfort of a family SUV.

Sound, options and fitting in detail: our Mercedes-AMG GLC63 X253 guide.

An SUV with a hand-built AMG V8: the GLC63 X253 receives the M177, a 4.0-litre twin-turbo with its turbos housed in the vee, with 476 hp and 650 Nm, or 510 hp and 700 Nm as a GLC63 S. The page covers both versions over the 2017 to 2022 model years; the V6 GLC43 and the GLC300 have their own page.

Recent regulations have imposed a particulate filter and oversized silencers on this V8, and its thunder has turned polite. The Rog cat-back, valved or with valves as some call it, gives it back the deep rumble and the bangs on the overrun; closed, it leaves the GLC63 the comfort of a family SUV, for the school run as for holidays.

For this SUV, the system follows your VIN and is fitted in about two hours on a lift, held by clamps and gaskets, without welding. The AMG modes keep control of factory valves; otherwise, the Rog remote, with its box in the boot.

Under the option name “Manifold”, this GLC63 actually receives the catalysed downpipe, as close as possible to the turbos housed in the vee. In 200-cell form, emissions control is retained, the most sensible configuration for an SUV driven every day. The 100-cell version, for its part, will be accepted or not depending on the car and the rules in your country, and the decat variant is reserved for track use: two choices that fit poorly with a family SUV. For the 510 hp GLC63 S, the page publishes a Stage 2 of 590 hp and 920 Nm, with a full ECU remap. As for materials, titanium around 40% lighter or 304 stainless steel, rounder to the ear.