2825 superchips flashpaq tuner. good for 1999- 2006 GM v8 cars ls1, ls2 and ls6 may fit more but that is what it says on the box. Worked good on my vette with just a few bolts ons. I'm getting a dyno tune today so i will not be needing this. i will be putting the stock tune back on the car before the dyno tune so it won't be married to my car. $140