Remu Double Tip Valvetronic Exhaust Remote With Vacuum Valve For All CARRemu 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. 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 stock unit by restricting the exhaust flow. With the exhaust valves open, the system roars giving you the performance and sound you desire. Package