Hey ya'll. My first post here. I'm a nOOb for sure but looks like there's a bunch of knowledge to be gianed from being here. In response to deadbolt services, I was feeling the same as Rush in that I wanted to most out of my vf 30 in my 03 rex. I had it coated, ported, polished. Then I had to (my shop, that is) take it out and send it back because it was "overported". Deadbolt was great about repairing it and put a bigger wastegate flapper on for free. However, it was a pain. Overall, I think maybe it takes a good tune to get max performance out of the treatment. It does, however, keep under the hood temps lower. I don't have numbers but that's why lots of folks get it coated. If I got a new turbo, would I do it over again? I think so if I I was taking it to a reputable tuner (I have ecutek) and, like Marksti said, if I was gonna keep it for a while. The underhood temps have to help with longevity.