Originally Posted by 360ci
It might not have enough backpressure hence the different sound. Taking away too much backpressure can also affect mileage.... so keep that in mind.
Sorry forgot to mention that its a diesel. The back pressure that a diesel needs is created by the Turbo turning the vanes and spooling so there is boost created on the other side of the turbo going thru the intercooler and being forced in to the engine to provide sufficient air to make the CTD come alive. Backpressure that is used on a non Turbo Charged gas engine comes somewhat from the restricted exhaust system.
I'm learning as I go along, still trying to figure the lope out tho. Truck is still all stock.