Actually there is the early 09 which had the upgraded fuel cell and steel body panels and floor, then the other with aluminum body panels and floor. Count the teeth on your top sprocket most came with a 13, but the 12 will add more bottom end and more grunt in low. Call these guys
http://www.robertsonstorquetubes.com/ and order one of their headers. It runs around $59 and couple it with a good performance pipe and it will open it up nicely. I put this, a Big Gun EvoR, 32mm pumper, UNI, and 17g rollers and it woke it up nicely. If you shop around you can do all of this for under $300. Congrats on the pickup.