It's stiffer. You can also get springs made or contact spring company and tell them what you have - and they can cross ref spring rates & size to springs that fit your car.(to get rid of "ass-sag") I highly doubt you're going to find coil-overs (good euro quality ones for an L7)It's a luxo-cruiser not a Road Atlanta racer. You might find coilovers from an American shock co such as maremont, etc but they're for loads not handling and their life spands are questionable.