Gas tuners

[NoisyTJ]

Hey guys, my tow rig (and DD until I get the 4.6 stroker finished) is a 2003 Chevy 1500HD 4x4 with the 6.0L. I love the truck but like most people, I want more power. Right now I have a K&N cold air kit, and the stock exhaust with a Magnaflow dual in single out muffler. Im interersted mainly in a little more power for towing so its not downshifting on every slight grade I come to. I also want to firm up the shifts a little bit, the shifts from the 4L80E just dont feel like a HD tranny should to me. I'm pretty much split between the Superchips Cortex and the Diablosport Predator. Does anyone have experience with either of these and some feedback?

[Johnnie Walker]

An LSx or LS style intake will net you some ponies.. And, is bolt -in, of course.

[StylerG]

check out blackbear tunes, its more detailed than an out of the box tune and will be personalized for your truck. its what i have on my tahoe and could notice an incredible difference in power, shifts and even mileage.

[flexinxj]

Both are great tuners, very similar real world gains. Main difference is the superchip can be updated on home pc with just a USB the diablo can to but it takes a cable that's a little harder to get and it's slighty more complicated, neither are hard but the superchip is just simple and straight forward. Personally I prefer superchip to diablo but aside from what I just said they aren't much different