Exhaust header system

An exhaust header system for an internal combustion engine comprising:

• primary tubes, each having inlet and outlet ends, said inlet ends being adapted to carry exhaust gas from exhaust ports of said internal combustion engine;
• and
• a collector including:
• a collector inlet for receiving said exhaust gas from said primary tubes, said collector inlet exhibiting an ovular cross-section defined by a width and a height, said width being greater than said height, and said outlet ends of said primary tubes being aligned along said width;
• a collector outlet exhibiting a circular cross-section;
• and
• an intermediate section juxtaposed between said collector inlet and said collector outlet for carrying said exhaust gas from said collector inlet to said collector outlet, said intermediate section exhibiting a cross-section that transitions from said ovular cross-section to said circular cross-section proximate said collector outlet.

An exhaust header system for an internal combustion engine comprising:

• primary tubes, each having inlet and outlet ends, said inlet ends being adapted to carry exhaust gas from exhaust ports of said internal combustion engine;
• a collector having a collector inlet for receiving said exhaust gas from said primary tubes and a collector outlet, said outlet ends of said primary tubes converging at said collector inlet, said collector inlet exhibiting an ovular cross-section, and said collector outlet exhibiting a circular cross-section;
• a catalytic converter coupled to said collector outlet of said collector;
• and
• a heater box enclosing said primary tubes and said collector inlet of said collector, said heater box including an air inlet and an air outlet, wherein cool air is drawn into said heater box via said-air inlet, and heat radiated from said primary tubes warms said cool air to form warm air, said warm air being release released from said air outlet.