Y-pipe for thin boom tube exhaust pipes providing increased ground clearance on race cars

A Y-pipe assembly for attachment to the respective ends of a pair of primary exhaust pipes or header assemblies which lead exhaust gasses from the engine of a motor vehicle, and to the inlet of a boom tube exhaust pipe which mounts to the bottom portion of the frame or chassis of the motor vehicle, which Y-pipe assembly and boom tube exhaust pipe provide improved ground clearance, comprising:

• a first secondary exhaust pipe of a generally rounded cross-section comprising an inlet portion connectable to one of the header assemblies for receiving exhaust gasses therefrom and a longitudinally beveled outlet portion;
• a second secondary exhaust pipe of a generally rounded cross-section comprising an inlet portion connectable to the other of the header assemblies for receiving exhaust gasses therefrom and a longitudinally beveled outlet portion;
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• wherein said beveled outlet portions of said secondary exhaust pipes are affixed together along a respective edge of each thereof so as to merge together with respective centerlines thereof at an oblique angle to a single outlet opening which is connectable to the inlet of the boom tube by affixing thereto, and wherein said respective secondary exhaust pipes are longitudinally tapered in the vertical direction so as to be thinner at said outlet portion than said inlet portion thereof.

A tubular inlet for a boom tube exhaust pipe of the type which includes a tubular body of generally flattened shape, the boom tube exhaust pipe being for attachment to the outlet end of a Y-pipe attached to an exhaust header assembly which leads exhaust gasses from the engine of a motor vehicle, the tubular body having a first end with an inlet opening for receiving exhaust gasses and a second end which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere, the boom tube exhaust pipe which mounts to the bottom portion of the frame or chassis of the motor vehicle so as to provide improved ground clearance, the tubular inlet comprising:

• a first end of mating configuration for attachment to the Y-pipe with an inlet opening of a generally rounded cross-section for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a generally flattened second end of mating configuration for attachment by being affixed to the tubular body for channeling the exhaust gasses from the Y-pipe to the body of the boom tube exhaust pipe;
• a first and a second structural rib which extend generally longitudinally through said tubular inlet and which vertically span between and are affixed to said tubular inlet juxtaposed an upper and a lower inside surface of said tubular inlet so as to provide support therebetween, said ribs being disposed in a spaced apart relationship.

A tubular inlet for a boom tube exhaust pipe of the type which includes a tubular body of generally flattened shape, the boom tube exhaust pipe being for attachment to the outlet end of a Y-pipe attached to an exhaust header assembly which leads exhaust gasses from the engine of a motor vehicle;

• the tubular body having a first end with an inlet opening for receiving exhaust gasses and a second end which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere, the boom tube exhaust pipe which mounts to the bottom portion of the frame or chassis of the motor vehicle so as to provide improved ground clearance, the tubular inlet comprising:
• a first end of mating configuration for attachment to the Y-pipe with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a generally flattened second end of mating configuration for attachment by being affixed to the tubular body for channeling the exhaust gasses from the Y-pipe to the body of the boom tube exhaust pipe;
• a first and a second structural rib which extend generally longitudinally through said tubular inlet and which vertically span between and are affixed to said tubular inlet juxtaposed an upper and a lower inside surface of said tubular inlet so as to provide support therebetween, said ribs being disposed in a spaced apart relationship diverging from said first to said second end of the tubular inlet;
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• wherein said tubular inlet and ribs comprise a pair of respective inner shells of generally L-shaped cross-section and a pair of respective outer shells of generally U-shaped cross-section, said inner shells each being a single piece of formed sheet metal having a generally flat wall portion of generally trapezoidal shape with one of said ribs dependent therefrom also being of generally trapezoidal shape, said outer shells each being a single piece of formed sheet metal having a pair of spaced apart, generally flat walls of generally trapezoidal shape interconnected by respective curved side wall portions, said inner shells which fit together to form a tubular middle passageway and said outer shells which fit laterally juxtaposed said inner shells to form respective lateral passageways with said inner shells, said inner and outer shells being affixed together at a pair of upper and a pair of lower generally longitudinally-extending seams.

A Y-pipe and tubular inlet assembly for attachment to the respective ends of a pair of primary exhaust pipes or header assemblies which lead exhaust gasses from the engine of a motor vehicle, and to a tubular body of a boom tube exhaust pipe of the type having a generally flattened shape, the tubular body having a first end with an inlet opening for receiving exhaust gasses and a second end which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere, the tubular inlet and body which form a boom tube exhaust pipe which mounts to the bottom portion of the frame or chassis of the motor vehicle and which along with the Y-pipe provide improved ground clearance, the Y-pipe and tubular inlet assembly comprising:

• a Y-pipe having a first secondary exhaust pipe comprising an inlet portion connectable to one of the header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, and a second secondary exhaust pipe comprising an inlet portion connectable to the other of the header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, wherein said bevelled outlet portions of said secondary exhaust pipes are affixed together along a respective edge of each thereof so as to merge together with respective centerlines thereof at an oblique angle to a single outlet opening which is connectable to the inlet of the boom tube by affixing thereto;
• and
• a tubular inlet having a first end of mating configuration and affixed to said Y-pipe with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a generally flattened second end of mating configuration for attachment by being affixed to the tubular body for channeling the exhaust gasses from the Y-pipe to the body of the boom tube exhaust pipe.

A boom tube exhaust pipe for attachment to the end of secondary exhaust pipes leading exhaust gasses from the engine of a motor vehicle, which boom tube exhaust pipe mounts to the bottom portion of the frame or chassis of the motor vehicle, and which provides improved ground clearance between the exhaust pipe and the surface of the ground, comprising:

• a tubular inlet having a first end of mating configuration for attachment to the secondary exhaust pipes with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a second generally flattened end;
• a tubular body of generally flattened shape corresponding to said second end of said tubular inlet, said tubular body having a first end affixed to said second end of said tubular inlet with an inlet opening for receiving exhaust gasses therefrom and a second end which extends therefrom and which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere;
• and
• wherein a pair of structural ribs, a first of which extends generally longitudinally through said tubular inlet and which vertically spans between and is affixed to said tubular inlet juxtaposed an upper and a lower inside surface of said tubular inlet so as to provide support therebetween, and a second of which extends generally longitudinally through said body and which vertically spans between and is affixed to said body juxtaposed an upper and a lower inside surface of said body so as to provide support therebetween.

A boom tube exhaust pipe for attachment to the end of secondary exhaust pipes leading exhaust gasses from the engine of a motor vehicle, which boom tube exhaust pipe mounts to the bottom portion of the frame or chassis of the motor vehicle, and which provides improved ground clearance between the exhaust pipe and the surface of the ground, comprising:

• a tubular inlet having a first end of mating configuration for attachment to the secondary exhaust pipes with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a second generally flattened end;
• a tubular body of generally flattened shape corresponding to said second end of said tubular inlet, said tubular body having a first end affixed to said second end of said tubular inlet with an inlet opening for receiving exhaust gasses therefrom and a second end which extends therefrom and which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere;
• and
• a pair of structural ribs which extend generally longitudinally through said tubular inlet and which vertically span between and are affixed to said tubular inlet juxtaposed an upper and a lower inside surface of said tubular inlet so as to provide support therebetween, said ribs being disposed in a spaced apart relationship within said tubular inlet, wherein said structural ribs diverge from said first to said second end of said tubular inlet.

A Y-pipe and boom tube exhaust pipe assembly for attachment to the respective ends of a pair of primary exhaust pipes or header assemblies which lead exhaust gasses from the engine of a motor vehicle, which Y-pipe and boom tube exhaust pipe assembly mounts to the bottom portion of the frame or chassis of the motor vehicle, and which provides improved ground clearance between the exhaust pipe and the surface of the ground, comprising:

• a Y-pipe having a first secondary exhaust pipe comprising an inlet portion connectable to one of the header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, and a second secondary exhaust pipe comprising an inlet portion connectable to the other of the header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, wherein said bevelled outlet portions of said secondary exhaust pipes are affixed together along a respective edge of each thereof so as to merge together with respective centerlines thereof at an oblique angle to a single outlet opening which is connectable to the inlet of the boom tube by affixing thereto;
• and
• a boom tube comprising a tubular inlet having a first end of mating configuration and affixed to said Y-pipe with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a generally flattened second end, and a tubular body of generally flattened shape corresponding to said second end of said tubular inlet, said tubular body having a first end affixed to said second end of said tubular inlet with an inlet opening for receiving exhaust gasses therefrom and a second end which extends therefrom and which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere.

An exhaust system for use on a motor vehicle powered by an internal combustion engine having multiple power cylinders at opposite sides thereof which provides improved ground clearance, comprising:

• a pair of exhaust pipe header assemblies each including a plurality of primary exhaust pipes each connectable at a first end thereof to a respective power cylinder at a respective side of the engine and a merge collector into which respective opposite ends of said primary exhaust pipes are affixed;
• a Y-pipe having a first secondary exhaust pipe comprising an inlet portion connectable to said merge collector of one of said header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, and a second secondary exhaust pipe comprising an inlet portion connectable to said merge collector of the other of said header assemblies for receiving exhaust gasses therefrom and a bevelled outlet portion, wherein said bevelled outlet portions of said secondary exhaust pipes are affixed together along a respective edge of each thereof so as to merge together with respective centerlines thereof at an oblique angle to a single outlet opening which is connectable to the inlet of the boom tube by affixing thereto;
• and
• a boom tube comprising a tubular inlet having a first end of mating configuration and affixed to said Y-pipe with an inlet opening for receiving exhaust gasses therefrom, said tubular inlet tapering from said first end to a generally flattened second end, and a tubular body of generally flattened shape corresponding to said second end of said tubular inlet, said tubular body having a first end affixed to said second end of said tubular inlet with an inlet opening for receiving exhaust gasses therefrom and a second end which extends therefrom and which terminates at an outlet opening for expelling the exhaust gasses into the atmosphere.