Just so everyone knows I went with 5 leafs in my springs. This is the same as what my 340 Challenger RT came with from the factory. I went with 1 inch over stock when (Springs N Things) made my springs. I would say the car seem to take bumps in the roads better with more spring movement. I think this is because my other springs had sagged so much limiting my supension movement when I would hit a bump before it actually seemed like suspension just stayed where it was when I would hit a bump which would feel like a smack in the rear end causing alot of noise at the same time. I'm very happy with the springs but it did raise my Challenger more than I thought it would.
Jeff