Exhaust pipe structure for vehicle

An exhaust pipe structure for an engine of a vehicle, comprising:

• a front exhaust means for discharging exhaust gas from a front portion of the engine, the front exhaust means extending downward, and curving and extending rearward;
• a rear exhaust means for discharging exhaust gas from a rear portion of the engine, the rear exhaust means comprising an upstream portion extending downward from a rear portion of the engine and a downstream portion that includes a first extended portion extending forward from the lower end of the upstream portion, a second extended portion, and a curved portion connecting front ends of the first and second extended portions the rear exhaust means having a length that is substantially the same as that of the front exhaust means;
• and
• a confluence portion of rear ends of the front and rear exhaust pipes, the second extended portion of the downstream portion of the rear exhaust means extending forward from the confluence portion.

An exhaust pipe structure for use in a vehicle having an engine with a front and a rear engine block, the pipe structure comprising:

• a front exhaust pipe extending adapted to extend downward from the front engine block and curving rearward;
• a rear exhaust pipe comprising:
• an upstream portion adapted to extend downward from the rear engine block;
• a downstream portion extending forward from an end of the upstream portion, the downstream portion including:
• a first extended portion extending forward from the end of the upstream portion;
• a U-shaped portion connected at an end to a forward end of the first extended portion and bending downward;
• and
• a second extended portion having a forward end connected to a second end of the U-shaped portion and extending rearward from the bent portion,
• wherein a length of the rear exhaust pipe is substantially the same as that of the front exhaust pipe;
• and
• a confluence portion coupling a rearward end of the front exhaust pipe and a rearward end of the second extended portion of the rear exhaust pipe and adapted to be connected to a main exhaust pipe.