Abstract: An intake manifold includes an upper shell, a lower shell, and a middle shell that interconnects the upper and lower shells. The lower shell has a plurality of longitudinally spaced shell ports. Each shell port is adapted for installation over a corresponding intake port for an engine cylinder head. The upper shell has a plurality of runners that are used to guide air to the shell ports. The middle shell has a plurality of channels that interconnect the runners and the shell ports such that air can flow through the runner to the cylinder intake port. Fuel injector pockets are formed within the upper, middle, and lower shells with each of the pockets having an injector opening in communication with the corresponding shell port. An internal fuel rail, formed between the upper and middle shells, supplies fuel to each of the injector pockets. A fuel injector is installed into each injector pocket such that the injectors are substantially enclosed within the manifold.

Abstract: An air filter housing including top and bottom housing portions joined by a catch. The housing portions each include a plurality of walls joined together to define an enclosure with and opening circumscribed by an edge. The edge of each portion includes a surface for contacting a seal disposed between the surfaces when the housing portions are joined to form the filter housing. The portions are joined by a hinge assembly and a catch which extends along a side of the filter housing to compress the seal between the portions to form a generally air tight seal therebetween. Typically the seal is integral with a filter element which is in an air flow path between openings in the housing portions.

Abstract: The interior sidewall surface of a fuel injector socket is provided with a pair of bumpers, one to either side of an opening in the sidewall surface that communicates the socket to a fuel passage. The bumpers prevent an O-ring seal that is disposed around the outside of the fuel injector from contacting the edge of that opening during insertion and removal of the fuel injector into and from the socket. The bumpers have radiused surfaces that are presented to the fuel injector so that their contact with the O-ring does not damage the O-ring.