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The 840i is the 8 Series for drivers who want a grand tourer to use often: a B58 3.0-litre turbo straight-six, an eight-speed automatic and a choice of rear-wheel drive or xDrive, as either the G15 coupé or the G14 convertible with its fabric roof. This page covers European versions with a gasoline particulate filter.
For the BMW 840i (G14/G15) Coupé/Cabriolet OPF (2019-), Armytrix offers the cat-back system with Valvetronic silencers and downpipes. Versions without a catalyst are for track use only.
Armytrix builds its exhausts in Taiwan, in T304 stainless steel and titanium, and is one of the brands that made valved exhausts affordable: the valve sends the gases through the silencer or around it, and it is controlled with the supplied remote or a smartphone app through a module plugged into the OBD port. Armytrix exhausts are not road approved in the European Union or Switzerland: they are intended for track use.
Armytrix systems are prepared to order and the price is on request: contact us for a quote, for delivery times or if you have any doubt about compatibility with your car. All Armytrix exhausts for BMW are on their own page.
