Would u recomend a Hpp3??
If it's an M6... unless you're changing gears, tire size, etc.. the only useful thing is the fan controls and a switch is cheaper
If you plan on doing any big changes to the car, and are fairly computer competent as well as understanding (or willing to learn) the LS1 Edit tables LS1 Edit is the way to go.
If you're not going to make many changes, a custom DYNO tune is about as much as the LS1 Edit software so you may be better off going to a local speed shop that has the unlimited LS1 Edit and paying them to do the programming.

