I would like to know something abt altering the silencer of Daewoo's Cielo(Indian name....).What i wud like to achieve is a great "sporty" sound w/o actually pulling the mileage down.It has a catalytic converter and 2 mufflers after the converter.I cut opened the silencer and inserted a big metal pipe in the center muffler.Does it increase the sound ??I really dont know what its called outside India...but the model has been running in Europe and other parts of Asia as well...Anybody to throw some light??