torson bar suspension

[ol school]

I have a 2006 chevy 1500 extended cab with torson bar suspension, I have checked other 2006 trucks they do not have the same front end or the same type of steering. I almost forgot it is two wheel drive. Anybody else have this setup. The rear springs were replaced they are not your regular 1500 springs they were almost $200 more than the regular 1500 springs, the truck sits higher in the front and rear than my buddies truck he also has a 1500. His has a stock suspension???????