Ok, so I decided on the SLP Blackwing for cold air. Have any of you guys had a tune done? What is this all about? As it seems it's like turning the car from a closet freak into the tasmanian devil.

What I forgot to mention is that it's a dyno tune, not a handheld.

I'd suggest finding a local shop with LSx experience, or just get a mail order tune from one of the big names that's made for your specific mods.