Audi S5 Coupé 8T 4.2 V8 Valved Exhaust System (2007-2012)

The Audi S5 Coupé 8T 4.2 V8 exhaust in detail.

The first S5 in history, the 8T from 2007 to 2012 is powered by the 4.2 FSI, a naturally aspirated V8 rated at 354 hp. No turbo to smooth its voice: the response is immediate and power climbs with the revs. This page overlaps with the “S5 B8 Coupé 4.2 V8” page, based on a detailed technical specification; the V6 S5 8T and the RS5 8T each have their own page.

The factory exhaust, heavy and muffled, holds back precisely the midrange in which this V8 builds its crescendo. With the valves open, our valved cat-back reduces back pressure and makes the climb continuous, hoarse and then increasingly clear; with the valves closed, the coupé stays usable every day without wearing out its occupants.

This page comes from the old catalogue: we match your VIN against our technical reference before manufacturing, and point you towards the S5 B8 page if needed. Clamps, gaskets, no welding and about two hours in the workshop are enough for fitting; factory valves keep their control, otherwise the Rog remote operates them.

Offered on the page under the name “Manifold”, this V8’s front part houses the catalytic converters. A V8 S5 still taken out regularly is best served by the 200-cell, a guarantee of maintained emissions control; in 100-cell form, it is accepted or not depending on the vehicle and your country’s rules, and its decat variant is reserved for track use. On a naturally aspirated engine, the power gain remains modest: 3 to 8% with an ECU remap. The V8 gets along equally well with full-sounding 304 stainless steel and with titanium, around 40% lighter and finished as you choose.