... time (1)exhaust flexible pipe, automobile exhaust system component(2)installed between engine and muffler(3)absorbs muffler pipe thermal ... of the pipes are 1.75 inch(45mm), 2 inch(51mm), 2.25 inch(57mm), 2.5 inch(63mm) and 3 inch(76mm)(7)The usual length of the ... pipes are 4 inch(102mm), 6 inch(152mm), 8 inch ...