BMW 540i B58 G30 / G31 Valved Exhaust System (2018-2023)

Which valved exhaust for a BMW 540i G30 or G31?

The Rog system for the BMW 540i B58 is a valved cat-back exhaust for the G30 saloon and G31 Touring, built to your VIN in 304 stainless steel or titanium for the six-cylinder with 340 hp, then 333 hp with mild hybrid assistance. If the car left the factory with valves, the system keeps their control through the driving modes; valves open, the B58 regains its round, even song.

Sound, options and fitting in detail: our BMW 540i G30 / G31 guide.

As a G30 saloon or G31 Touring, the 2018 to 2023 540i receives the B58, a 3.0-litre turbocharged inline-six: 340 hp and 450 Nm before the facelift, 333 hp in mild hybrid form afterwards. The engine focuses on smoothness and reach, with generous torque very early. Its four-cylinder cousin, the 530i, uses the same system according to the guide but keeps a separate page, as does the M550i with its V8.

The B58 unfurls the round, even song of the inline-six, more metallic at high revs, but in a factory 5 Series it is reduced to a breath, barely perceptible from the cabin, even under hard acceleration. Our valved cat-back, with the valves open, gives both the saloon and the Touring a new presence, with a clean climb through the revs and crackles on the overrun; with the valves closed, you get back the tranquillity of a grand tourer loaded up for the holidays.

Fitting calls for no welding, whether the car is a saloon or an estate: clamps, gaskets, about two hours, and a system made to the VIN whose valves stay controlled by the factory driving modes where they exist, by the Rog remote otherwise.

The front part on this page, sold under the “Manifold” option, is the B58’s downpipe; without an ECU remap, it only changes the voice and the weight. A family Touring will happily keep its emissions control with the 200-cell, the 100-cell being accepted or not depending on the vehicle and your country’s rules and the decat version reserved for track use. 304 stainless steel extends the roundness of the inline-six, while titanium brightens it and weighs around 40% less.