Magnaflow Double Tip Valvetronic Exhaust Remote With Vacuum Valve For All CARMagnaflow Double Tip Valvetronic Exhaust Remote With Vacuum Valve For All CAR Features Many people are not familiar with what a Valvetronic exhaust is or does. The idea of at the push of a button you can switch between quiet and racing mode is a feature which AutoTrends has on many exhaust systems. Where other exhausts are always loud but this Power valved systems allow you to switch to a quiet mode. This Normal quiet mode is usually the same as a