How Does a Bimodal Exhaust Work?

A bimodal exhaust allows you to control the sound of your car's exhaust note or volume. Bimodal exhausts are a huge refinement in the functionality of performance exhaust systems and the use of the intake and exhaust valves. The systems offer the smooth flow of sports exhausts with the added benefit of a much lower sound level at the push of a button. Bimodal exhausts use mechanisms to control the flow of exhaust inside the muffler to produce different modes of sound depending on the flow inside the muffler, directing the exhaust through a chambered path.

Bimodal exhaust systems are much more complicated than ordinary aftermarket systems and it may be more expensive than the conventional stock systems and sport upgrades. Bimodal systems consists of many main parts, the main listed below.

Gate motor

This is the heart of the system which controls the butterfly valve that defines exhaust gasses passing through the muffler.

Control kit

The electronic board and circuitry that allows the driver to select normal, sport mode or combined. It can be controlled via Bluetooth.

Muffler

The main part of the hardware.

What makes the bimodal exhaust system different from all other conventional systems is the ability to turn the sound on and off depending on the driver’s needs Many systems use smartphone software to manually or automatically change and adjust between sound modes, as well as edit the percentage of sound you’d like to hear. Some also offer a feature that adjusts the sound automatically when you enter somewhere like a local neighbourhood.

Normal and tuned modes can be switched between with a switch or button, or in new car models, through the driver display system. Below are some good exaomples of aftermarket systems.

Harrop Pro Extreme Series Exhaust System

Made of 409-grade stainless steel, this full system kit is fitted from the engine headers down to the rear mufflers. The kit includes all pipes and mufflers, hardware, fasteners and gaskets. It can be custom coated in ceramic. Price : $3,927.00

XForce VFII Bi-Modal Full 3" System

A bimodal system aimed at people who want to upgrade to a new exhaust system without paying too much. Price : $2,600.00