WILL NOT RUST THESE SCREWS HOLD ON THE LARGE MUFFLER HEAT SHIELD. 4 OR 5 ARE NEEDED. THEY ALSO USE A INSOLATING GASKET WHICH ARE SOLD SEPERATLY. THESE ARE THE TAPERED ONES SOME APPLICATIONS ON CT110'S USE A FLAT HEAD SCREW I WILL BE LISTING THEM SOON. B41C (359A)