Originally Posted by snrusnak
Yeah IMO 20hp is still worth the $300 especially with the other features you get. Just unfortunately for you guys you don't gain as much with the older 4.7L.
Look into diablo predator and SCT they are good as well. Superchips just has great performance compared to diablo in my experience(SC tunes ran faster 1/4 miles than the diablo tunes) along with other things like easier starting with the SC compared to the diablo(SC did not advance timing at startup where as diablo did and made it difficult to start). And SC gives you transmission tuning.
I have no experience with SCT though but hear great things.
very good info. thankyou. i think i will be getting the superchips for my intake and exhaust, and the trans tuning is a nice touch too. does the SC work as a flash? or do u have to keep it plugged in to the OBD? im guessing it is like a cobb acessport