A good example of the benefits for a valve system in everyday life would by my drive to work this morning after dropping off my daughter at school. It is a nice day so I put the top down coming out of the school and had the exhaust closed driving around the SUV moms. From the school to US1 I went through Coconut Grove, which is a really nice drive in the morning with lots of shade trees, but completely residential. After picking up US1 to downtown though the traffic opens from US1 into 95, so for a brief stretch I can open the exhaust and smile until the downtown exits. Once I exit to downtown I can close the exhaust and drive up into the garage.
An exhaust for all conditions.
AA Pulley, Air Filter and Tune - Full Evolve Valvetronic Exhaust