Air Power Systems Company, Inc. (APSCO) has been serving the trucking industry since 1964 with a dedication to service, performance and reliability. Introducing the new C-3505-DM direct mount pneumatic shifting solution for the Parker/Commercial C101 and 102, the Permco DM-640 and the Muncie E & EH series. One cylinder, one stock item, and one solution for all of your dump-pump shifting needs. Accompanied with the industry standard AV-295 and APSCO tailgate locks, operating a dump body has never been easier. 'MAKE IT DIRECT' with APSCO's dump-body line.