An engine assembly for a vehicle, said engine assembly comprising: a cylinder block; a cylinder head disposed on said cylinder block; a cylinder head cover configured to enclose at least a portion of said cylinder head; one or more ports (103, 106) disposed in said cylinder head, said one or more ports (103, 106) include at least one intake port and atleast one exhaust port; an exhaust pipe; and at least one or more detecting members for detecting one or more gaseous components being emitted from said one or more ports (103, 106), characterized in that, said at least one exhaust port includes an originating portion, an emerging portion, and an exhaust path traversing from said originating portion to said emerging portion, said emerging portion having a predetermined locus point, said locus point being sandwiched at a mating surface between said at least one exhaust port and said exhaust pipe, wherein, said one or more detecting members having a detecting portion, said detecting portion being disposed ahead and upstream of said locus point, wherein a portion of said cylinder head being disposed at a close proximity to said at least one exhaust port, said portion having a depression, said depression being configured of receiving said one or more detecting members, wherein said at least one exhaust port being attached adjoiningly to said exhaust pipe, said at least one exhaust port and said exhaust pipe together being designed to form a curved structure including an increasing curve in said exhaust port and a decreasing curve in said exhaust pipe, wherein said at least one exhaust port and said exhaust pipe including a curved outer circumferential surface (108a, 108b), said outer circumferential surface being configured with an increasing diameter, said increase in diameter being towards said at least one exhaust port, said curved outer circumferential surface (108a, 108b) having a highest diameter being disposed at said locus point. a cylinder block; a cylinder head disposed on said cylinder block; a cylinder head cover configured to enclose at least a portion of said cylinder head; one or more ports (103, 106) disposed in said cylinder head, said one or more ports (103, 106) include at least one intake port and atleast one exhaust port; an exhaust pipe; and at least one or more detecting members for detecting one or more gaseous components being emitted from said one or more ports (103, 106), characterized in that, said at least one exhaust port includes an originating portion, an emerging portion, and an exhaust path traversing from said originating portion to said emerging portion, said emerging portion having a predetermined locus point, said locus point being sandwiched at a mating surface between said at least one exhaust port and said exhaust pipe, wherein, said one or more detecting members having a detecting portion, said detecting portion being disposed ahead and upstream of said locus point, wherein a portion of said cylinder head being disposed at a close proximity to said at least one exhaust port, said portion having a depression, said depression being configured of receiving said one or more detecting members, wherein said at least one exhaust port being attached adjoiningly to said exhaust pipe, said at least one exhaust port and said exhaust pipe together being designed to form a curved structure including an increasing curve in said exhaust port and a decreasing curve in said exhaust pipe, wherein said at least one exhaust port and said exhaust pipe including a curved outer circumferential surface (108a, 108b), said outer circumferential surface being configured with an increasing diameter, said increase in diameter being towards said at least one exhaust port, said curved outer circumferential surface (108a, 108b) having a highest diameter being disposed at said locus point. said at least one exhaust port includes an originating portion, an emerging portion, and an exhaust path traversing from said originating portion to said emerging portion, said emerging portion having a predetermined locus point, said locus point being sandwiched at a mating surface between said at least one exhaust port and said exhaust pipe, wherein, said one or more detecting members having a detecting portion, said detecting portion being disposed ahead and upstream of said locus point, said emerging portion having a predetermined locus point, said locus point being sandwiched at a mating surface between said at least one exhaust port and said exhaust pipe, wherein, said one or more detecting members having a detecting portion, said detecting portion being disposed ahead and upstream of said locus point, wherein a portion of said cylinder head being disposed at a close proximity to said at least one exhaust port, said portion having a depression, said depression being configured of receiving said one or more detecting members, wherein said at least one exhaust port being attached adjoiningly to said exhaust pipe, said at least one exhaust port and said exhaust pipe together being designed to form a curved structure including an increasing curve in said exhaust port and a decreasing curve in said exhaust pipe, wherein said at least one exhaust port and said exhaust pipe including a curved outer circumferential surface (108a, 108b), said outer circumferential surface being configured with an increasing diameter, said increase in diameter being towards said at least one exhaust port, said curved outer circumferential surface (108a, 108b) having a highest diameter being disposed at said locus point.