[KJ Bob]

Yes, the Stage 1 PCM is specific to each model year. No, only the '03 Stage 1 comes with injectors, '04 thru '06 Stage 1's are just the PCM only. It's not really a kit, per se, unless you consider the included Stage 1 badge the second part to make up "the kit". A very simple install. Yes, it comes with instructions for the tranny learn (only needed for autos). The Jet chip is NOT the same as Stage 1. I've done Stage 1 twice -- my '04 GT auto and my '06 GT manual. It's a dramatic difference in performance with no loss (actually a small gain) in gas mileage. I can imagine in a turbo lite it would be a startling difference! It's the best bang for the buck you will get performance-wise and the gateway to further modifications if you so desire. Order from Haynes, wait impatiently for delivery, take 30 minutes to install it and then you'll discover just how little front wheel traction you have...