It was very profitable for me but I would happily pay full price. I installed it on my 2002 Dodge Durango 4.7L. It had the deep rumble I wanted without the crackle effect. It wasn't too loud to disturb you either. The sound is great up to about 30 km/h and after that you can still hear it, but it's not too much. Motorway driving is not too loud for everyone else, ie. Wife and children are not annoyed.