Said something about wieght transfer and stiffen up the rear end. they use springs also then put in bump stops. On a rear wheel drive car you try to get the car to stand up on the tyres, which means you don't want it to squat in the rear when it takes off. You want the car to lift or stay level in the rear and load up the tires. So on a fwd you want to do the same, to try and load up the the front tyres, on the guys car that told me about it he does this by using two sets of bump stops in the rear to stop the rear from droping, on his front shocks he can restriced the rebound on the front. So when he takes off the load goes to the rear hits the bump stops and the load goes to the front, his front will dip and the shocks help keep the front down.

Swifty