How to Make Your Car Louder for FREE! (Audi S4 Exhaust Valve MOD!)

How to make your car louder for FREE! Simple easy mod to make your cars exhaust louder. Works with any car having a Valved Exhaust system. First little mod to the B9 S4 and made a bigger difference than expected! The Audi S4 only opens the valves in dynamic mode and under certain RPMs and at a certain speed. This does not only apply to the Audi S4 but to almost all cars that come with a valved exhaust from the factory.

In the video we show the Audi S4 driving with the valves plugged in and at the end we show the car driving with the valves unplugged. There is no drone when unplugging the valves and it maintains a deep throaty sound when inside the cabin of the Audi S4.

Big plans are in store for the B9 Audi S4 and subscribe for more awesome content.

2019 Audi B9 S4 is otherwise stock with major upgrades on the way. This mod works with the B9 S5 as well.

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