Well, I had Bilsteins on my class C built on a Chevy G/P-30 Chassis and Koni FSD shocks on our class A (W-22) chassis and we absolutely loved the Koni FSD shocks. If I had a class C and could either replace the original shocks with Bilsteins or Konis, I would most likely pay the extra bucks for the Koni FSD shocks! bags.