An opening of an upper surface of an air cleaner main body has an air cleaner upper cover mounted thereon, and is closed by the air cleaner upper cover fastened by bolts via a seal member, and air cleaner bottom plates are fastened to the air cleaner main body via seal members in openings of a bottom surface of the air cleaner main body. Various embodiments may include a scheduled delivery component configured to receive delivery availability information for multiple shipment carriers. Optionally, the invention employs heuristic rules in association with the preferred protocol that adapt the protocol to the time and exchange requirements of financial commodities. Data from the active sensing heads may be sent to a host computer for processing to derive one or more vehicle measurements, for example, for measurement of parameters useful in wheel alignment applications. Still further, each of the graphic displays may be defined with a role or a functional use, such as an operator view, a maintenance view, etc.