Referring to FIG 1, an exhaust system into which {HEAD ~ a catalytic converter} of the present invention is applied comprises a bifurcated exhaust pipe comprising two upstream exhaust pipes 2 and 3 which are connected to a pair of {TAIL ~ exhaust ports} of the engine 1 and a common downstream exhaust pipe 4 
Referring to FIG 1 , an exhaust system into which { HEAD ~ a catalytic converter } of the present invention is applied comprises a bifurcated exhaust pipe comprising two upstream exhaust pipes 2 and 3 which are connected to a pair of { TAIL ~ exhaust ports } of the engine 1 and a common downstream exhaust pipe 4
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