PART NUMBER: K2181. 2005-2007 F250/F350 4WD. Budget System w/ Performance Shocks. ♦ (2) FTS7236 - Front Performance Shocks. ♦ (2) FTS7266 - Rear Performance Shocks. Performance Shocks The 4 Budget System utilizes the factory front coil springs with a steel upper spacer providing 4 of lift.