Progressive Suspension Lowering Blocks - Black B28-42007 Bolt-on shock mounts that move shock mounting points further back and down, lowering the rear of your bike approximately 1in. with no loss of wheel travel. Installation is easy, with no permanent modifications to your bike. All kits include instructions and all necessary hardware. Note: These lowering kits are not recommended to be installed on motorcycles equipped with lowered shocks. Lowering your motorcycle will reduce cornering clearance.