Abstract: A modular cab/sleeper structural assembly (31) for a truck-tractor vehicle (30) is provided which improves ride quality and structural integrity without substantially increasing the overall weight or sacrificing any advantages of separate cab and sleeper units. The assembly (31) includes a chassis frame (33) extending substantially longitudinal of the vehicle (30) and a cab unit (35) having a cab structural assembly (37) mounted to the chassis frame (33) by a first mount (42). A sleeper unit (38) having a sleeper structural assembly (40) is mounted to the chassis frame (33) by a second mount (43). A coupling member (41), coupled between the cab structural assembly (37) and the sleeper structural assembly (40) and independent of the chassis frame (33), rigidly couples the sleeper structural assembly (40) and the cab structural assembly (37) together to produce a substantially unified composite structure for increased structural integrity.

Abstract: An air intake system for providing air to the engine of a conventional truck is disclosed herein and includes an intake vent located on the side of the truck's cab just in front of its door. A cab elbow fabricated from rubber transports air from the intake vent through the interior of the cab and to an opening in the firewall where it connects with an air duct within the truck's hood compartment. The air is then transported via the air duct to the engine. The cab elbow is designed to minimize thermal and acoustical interference with the cab's interior. The present system may be used in conjunction with either cowl mounted air cleaners or an underhood air cleaner without modifying other components of the truck.