Anybody willing to take a plunge? I call 4x4connection and they price it for $371 for a pair of front torsion bar. That is a lot more affordable than $600-800 currently available. BDS tech support quote about 20 % stiffer than stock. The same goes with the rear coil spring. Plus they said the spring are constant rate but it does not look that way. The coil look like progressive spring design. I did not ask about he coil price though since I have rear air bag. 4X4 Connection BDS Suspension I believe they are made by Ironman Suspension, 4X4 connetion claim they are made by BDS but who knows.