Which one should I use to get a few extra ponies outta my 2003 2500HD w/ 6.0 motor?

Thanks

 

ls1 edit is the way to way to go...

 

if you have the money, go with edit. better off down the road if you go with more mods.

 

ls1-edit, if you have a laptop. if not you need one and that may decide it for you. of course you don't need a new laptop just one that works. you can do much more with edit. if all you'll ever need is to adjust for gears and tires and top speed and a little power the hpp111 works fine.

 

If you do not want to spend that much, just get a used HPP3 and when you are ready for ls1 edit, you can get it. Or better yet, have some one do it for you. It will probabably cost a little more than what a new HPP3 cost but it's a whole lot better.