stiffer springs that don't lower?

Hi - I'm wondering if it's possible to get stiffer springs that don't lower the car? I would like the firmer cornering but i live in the boonies and drive lots of dirt roads. No way could i afford to give up any ground clearance. I realize the lower center of gravity helps handling but i would be leaving my exhaust behind real soon. Also, i just won an Ecutune kit on ebay and will be installing it as soon as it arrives. Also planning to buy a Small Car shift kit right away.