Forza Componenti Valve Controller Model B4

For vehicles with two vacuum control valves. The Model B4 Controller is available as either a two-way exhaust controller or a three-way exhaust controller suitable for installation in harsh environments such as the engine bay of a high-performance sports car.  Normally aspirated vehicles can use the three-way controller whereas turbo-charged cars should not as it may be detrimental to the turbocharger. Depending on the application, the controller offers up to three modes of operation:
 
Normal Mode: The vehicle controls the operation of the exhaust bypass valves.  This is the stock mode.
Always Open Mode: Forces the valves to remain open at all times, overriding the vehicle's ECU.
Always Closed Mode: Forces the valves to remain closed at all times.  This mode should not be used with turbo-charged cars and by default will be disabled for turbo-charged vehicles.
 
If your vehicle is the Ferrari 488 (not the Pista) or the Ferrari 458, consider also getting the Forza Extension Cable as this provides additional installation flexibility when installing the controller module on the car. Click here for more information.