The Dynamat sound ending has really helped reduce the noise level inside our 2002 Corvette Z06. Before installing this product, the engine and road noise were so loud you could barely hold a conversation. Now, although there is still some elevated noise compared to a normal 4 speed car, it is much quieter. We even just drove the car with the sound ending on a 13 hour each way road trip. Couldn't have done that before.