Remanufactured in Detroit, MI, USA! All of our Rack and Pinions are air leak tested to assure reliable performance, hydraulically tested for bypass/hi-pressure, road simulation tested, and have tie rod load checked. 100% new o-rings and lip seals to ensures no leaking and quality performance. All new Teflon rings are added to the spool valve on the rack donut, restoring internal sealing of the rack & pinion. Racks are surfaced to OE specifications, the proper surface finish will prevent leaking between chambers and extend unit life.