Proper Parts was founded in 2006 by Alex Porti when he couldn’t find a replacement Power Seat Transmission for a 1981 Rolls-Royce Silver Spirit. As a result, he engineered and built a robust Power Seat Transmission to replace the original. Since then, we've sold over a thousand seat transmissions for certain model years of Rolls-Royce and Bentley, and many models of General Motors from the late 1970s to the late 1980s: Cadillac, Buick, Chevrolet, GMC, Oldsmobile, and PontiacWe also offer the accompanying Power Seat Motor fully rebuilt.  

We have many parts associated with these power seat systems including couplers, seat track glides, jack screws, screw drives and gear drives, actuators, retaining clips, square drive cables and sheaths, retaining plates, escutcheons, and switches. If you don't see what you're looking for, feel free to submit a request.

Our current product line also includes newly designed ECUs (electronic control units) that control power seats and mirrors in Range Rover Classic, Rolls-Royce, and Bentley. We've sold close to a thousand ECUs around the world since 2011, and we can probably recommend a mechanic near you who has experience with our product. Just contact us. 

We've recently added two new parts for AMC vehicles: Window Switch Mounting Brackets and Window Cable Repair Service.

We manufacture quality products that cannot be found anywhere else with exceptional warranties and a fair price. All of our parts are designed and manufactured in the United States. Proper Parts is a privately owned unaffiliated company. We sell directly to restorers, dealers, and individual car owners in the USA and Internationally. 

With over 25 years of experience restoring Rolls-Royce and other classic cars, we have the troubleshooter's perspective and are always developing new parts. We aim to build better than new.