it comes with the tuner, tunes, and cai. pick your poison: sct or predator. look at the price break down. cai w/ tunes for people that have tuner: $225. add about $400 for the tuner, and you are abouve the $600 mark. i dont think it is getting gouged. you might be able to buy the tuner cheaper somewhere if you have the "hook-up" but it is a competetive price, and all comes from the same place, so if there are any problems, it is an easy call to one company. search near and far on the web, and waste several hours trying to find a slightly better deal, or just go ahead and get it all in one place. thats what i would do. whats your time worth? mine is not worth a few hours to save $20. yeah you might get lucky and find a place cheaper in just a few minutes, but maybe not. i personally think that $600 is a real competetive price. just get it all at once.