So far to date I have not heard of anyone installing a fluid dampner on their ride. I installed one about a month or so ago on a friends truck and as far as I'm concerned that was a great investment. It changed the sound of the engine, smoothed it out both @ idle and in between shifts and has seemed in lending to alittle mpg. The best $450.00 he has spent to date. We made the purchase from a Bully Dog rep. on E-Bay just in case you all need to know. If anyone is interested in what it takes to change it out give me yell. It went on a 02 LB7!