Abstract: An exhaust system structure includes an exhaust manifold discharging exhaust gas through at least one runner towards an exhaust pipe. A front pipe is connected to a front end of the exhaust pipe. A collector connects the at least one runner and the front pipe. The collector comprises at least one inlet communicating with an exit of the at least one runner. An outlet communicates with the front pipe such that the outlet discharges the exhaust gas into the front pipe through the at least one inlet. An extended portion has a radius greater than or equal to that of the exit of the at least one runner.

Abstract: An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger.

Abstract: An exhaust system structure includes an exhaust manifold discharging exhaust gas through at least one runner towards an exhaust pipe. A front pipe is connected to a front end of the exhaust pipe. A collector connects the at least one runner and the front pipe. The collector comprises at least one inlet communicating with an exit of the at least one runner. An outlet communicates with the front pipe such that the outlet discharges the exhaust gas into the front pipe through the at least one inlet. An extended portion has a radius greater than or equal to that of the exit of the at least one runner.

Abstract: An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger.