Each unit computer tested at load to ensure reliable performance. All rotating and actuating components are properly hardened, ground, and polished to ensure longevity of the components and their respective seals. Application-specific, in-line filter provided with each unit. No filter modifications required. Built to meet or exceed O.E. form, fit, and function. Computerized spool valve balancing ensures exceptional feel and returnability. Environmentally friendly coating provides a clean appearance and prevents rust. Supplied with O.E. grade seals and O-rings to provide optimal sealing performance and longevity.