grooved bilsteins have....grooves! 
seriously, the grooved bilsteins have a couple of grooves cut on the shock body itself. You can then move the c-clip up or down on any of the grooves. This will either make the ride height lower or higher depending on the placement.
seriously, the grooved bilsteins have a couple of grooves cut on the shock body itself. You can then move the c-clip up or down on any of the grooves. This will either make the ride height lower or higher depending on the placement.
