I have k&n, headers, exhaust, and soon my x-metal tb will be in. I have been told I need a dyno tune. I read about DC Performance and RSI. I am looking for feedback. is either better. My plan was to get the dyno here locally and then send off the info and get a new computer and have it programmed, keeping my original for safe keeping. I would appreciate any input. oh, and if it makes a difference, I plan on installing a s/c this year...later on.