Abstract: An improved exhaust system for an internal combustion engine generally comprises two expanding megaphones, separated by a dual core annular flow silencing section. The two or split megaphone design facilitates broadening of the time of the negative pressure wave to provide a desirable broad range power output while substantially reducing obnoxious sound output.

Abstract: An improved exhaust system for an internal combustion engine generally comprises two expanding megaphones, separated by a dual core annular flow silencing section. The two or split megaphone design facilitates broadening of the time of the negative pressure wave to provide a desirable broad range power output while substantially reducing obnoxious sound output.

Abstract: A pick-up truck cargo bed partitioning system that is indexed to the wheel wells of a pick-up truck includes a planar base configured to lay flat on a floor of a pick-up truck cargo bed generally between the wheel wells of the pick-up truck, and at least one partitioning panel hingedly connected to the base. The partitioning panel is moveable with respect to the base between a first position wherein the partitioning panel is flat on the floor of the pick-up truck cargo bed and a second position wherein the partitioning panel is oriented in an upright position with respect to the floor of the pick-up truck cargo bed to divide the pick-up truck cargo bed into a plurality of compartments. The partitioning system can be easily installed by simply dropping it into the pick-up truck cargo bed with the base portion positioned between the wheel wells, and with the partitioning panel or panels positioned forwardly and/or rearwardly of the wheel wells.