BA, I love having the complete LPE set up. While going off road the speed is not necessary, it is NICE to have the extra couple hundred lb ft of torque even though I doubt I have ever needed it. Anyone stuck and needing a snatch will appreciate it too. You also do not sacrifice MPG.
With a SC you will have added much needed power to a most capable off road vehicle and the ability to scare the heck out of sports cars as you keep up or go by them leaving stoplights. Then you can wave, turn right and head for the mud.
This is LPE's Hummer page. If you go to the bottom you will see the price and such for the SC only. You can also see and read the Motor Trend review of their set up.
http://www.lingenfelter.com/pac6ltmagschum.asp
Please no comments about the intake. As I have stated before, it only takes a couple of minutes, three bolts and a couple of hose clamps to change to the stock box for going wheeling.
Black Lingenfelter Lux