You do not need to replace shocks.
You can get a small spacer for just the front or for a little more money: http://trdparts4u.toyotaofdallas.com...dproduct=-8315
Included in kit:
Front: 3" Front Lift Spacer Kit -- CNC Machined From T-6 6061 Aluminum.
6 longer top plate spacer studs.
Rear: (2) Rear coil spring spacers.
Complete lift kit, nothing else needed for level / lift
Works great with stock shocks