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Forza Ferrari 360 / F430 Electronic Valve Controller Kit Exterior McLaren Carbon Fiber Top centerThe Forza Componenti exhaust valve controller kit is the complete solution that allows the user to take full manual control of the vehicle's vacuum actuated exhaust bypass valves. The controller has a circuit board that controls the negative side of the exhaust valve vacuum solenoids. The user can manually open the exhaust bypass valves to have that classic engine sound at all speeds and engine RPMs. Of course, you can return the operation of the