Replacement set of 2 x studs with M6 (6mm diameter) thread at both ends and 2 x M6 nuts for use on exhaust manifolds on a wide range of scooters and motorbikes. Complete length: 32mm. The nut length allows for solid mounting of the exhaust system, in a way that standard nuts cannot. *Please check the diameter of your existing exhaust studs prior o purchase if you are unsure of compatibility.