Mercedes-AMG S63 W221 Valved Exhaust System (2008-2010)

The Mercedes-AMG S63 W221 exhaust in detail.

Before switching to twin-turbo power, the S63 W221 carried the M156: a 6.2-litre naturally aspirated V8 with 525 hp and 630 Nm, in a prestige limousine, for the 2008 to 2010 model years covered by this page. The 2006 and 2007 S63 W221, like the 2011 cars that moved to the 5.5-litre, are not included; the S63 W222, C217 and W223 have their own pages.

Generous displacement, volcanic character, rolling thunder: this V8 belongs to AMG’s golden era, and the factory exhaust, tuned for limousine buyers, leaves much of it asleep beneath the silencers. With the valves open, the Rog cat-back, a valved system also known as a valve exhaust, gives it back its depth, its bangs on the overrun, its physical presence. With the valves closed, the cruising comfort remains that of an S-Class.

This page only sells the rear system: no front section is offered, for lack of a part suited to this chassis. The factory catalytic converters therefore stay in place, and emissions control with them.

Fitting is done with clamps and gaskets, without welding, in about two hours, and the system is built to your VIN. Factory valve control retained if your S63 has it, otherwise the two-button Rog remote. As for material, 304 stainless steel gives the V8 a full bass; titanium, around 40% lighter, makes it clearer at high revs.