I run KYB's on my Challenger at the moment and Bilsteins on my Duster. Both cars have 1.12" torsion bars, so the wheel rate on the Duster is higher (300 lb/in vs 270). But the Duster rides much better than the Challenger. Obviously both are pretty firm, but the KYB's on the Challenger definitely give a harsher ride than the Bilsteins. Since the Challenger has less spring rate (longer bars) and is a heavier car, it really shows how important shocks can be. The Challenger handles great, but the Duster, even with the higher spring rate, is more comfortable to drive and handles even better.