Exhaust system for automotive engine

A dual type exhaust system for use with an internal combustion engine with front and rear rows of cylinders transversely mounted in a front engine room of a car body wherein a floor panel structure is formed with a bottom opened space for accommodating exhaust pipes, said dual type exhaust system comprising:

• a pair of exhaust pipe assemblies, one of said pair of exhaust pipe assemblies extending from the front row of cylinders and the other of said pair of exhaust pipe assemblies extending from the rear row of cylinders toward a back of said car body, the exhaust pipe assemblies being arranged side by side in said bottom opened space;
• and
• a pair or catalytic converters, only one of said pair of catalytic converters disposed in a interconnected with each exhaust pipe assembly of said pair of exhaust pipe assemblies;
• said catalytic converters being offset in a lengthwise direction of said car body with respect to said bottom opened space relative to each other.