The predator is ok but since it has preprogrammed programs you can't really tune the car. Diablo is guessing on what the parameters should be on the mods done. So you really don't know what the a/f is. Any multiple program chip with a custom tune w/ a/f is the best way to go. Either Diablo chip, Superchip, Autologic, etc. I have any old chip(autologic) and it has 4 different programs you can custom tune. Hope this helps. -Mark