Dodge Viper GEN 4 V10 Valved Exhaust System (2008-2010)

The Dodge Viper GEN 4 V10 exhaust in detail.

An 8.4-litre V10, 600 hp without a single turbo, 813 Nm of hurricane-force torque: the fourth-generation Viper, built from 2008 to 2010, owes its legend to unapologetic brutality. Its factory sound is already impressive, but the silencers contain it; the engine keeps something in reserve.

With the valves open, the Rog valved cat-back unleashes this V10: a seismic rumble, a spectacular climb through the revs, a physical presence that belongs to the Viper alone. With the valves closed, it agrees to pretend to be civilised, for journeys where diplomacy is called for. This system is designed for the GEN 4, as the GEN 5 takes different parts, and each Viper is checked against its VIN before manufacturing.

Fitting with clamps and gaskets, without welding, in about two hours; the factory valve control is retained if the car has one, and otherwise the Rog remote, whose box sits in the boot, takes charge.

On the Viper, the “Manifold” option refers to the 8.4-litre’s front part, where the catalytic converters are located. On such a naturally aspirated engine, power is not the point: combined with an ECU remap, this part brings a real but modest gain, around 3 to 8%, and without one mainly better breathing. A Viper driven on the road will keep the 200-cell version, the only one that keeps emissions control; the 100-cell version will be accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use, on supervised track days. 304 stainless steel or titanium, the latter removing around 40% of the weight for the same design.