Where the torsion bars go into the sidewall of the trunk, peel the carpeting back. The torsion bars go into slots in the sidewall behind the carpet. There are 3 slots. Move the torsion bars to the top slot to increase "springiness". Note that when you pull the torsion bar out of the slot, the trunk lid my drop, so you may want to prop it open while you do this. Also, you may want to wear gloves. The torsion bars have a fair amount of pressure on them and tend to want to go their own way. There are some sharp edges around there that you can cut yourself on while trying to wrestle it into the top hole