Yes you can but you have to change your shocks. The 04 models did not come with adjustable shocks however in 06 they did. You can buy a set of works,progressive, or any other brands that have adjustable length. You can also go with air ride but that will cost much more. The cheapest way would be to watch ebay for some works adjustable shocks from an 06 or newer models that shovelheadkicker sells.