Dynofit 2" Rear Lift Blocks Kit. Fit for 1999-2010 Ford F250 SRW & F350 SRW. Specialty: The Cross Gusset Plate Locked design of the rear lift block makes the vehicle more stable. Performance: The surface of lift block is coated with black powder for stronger rust and corrision resistance which can greatly extend the service lifte, more beautiful and clean.