V-Twin Mfg. Chrome 1-3/4 Muffler Clamp Set Smooth end exhaust clamp set is used for 1-3/4 extensions or mufflers. Clamp is stepped inside to seal exhaust gases in, so the black soot residue does not tarnish the pipes at this junction. Features: Connects 1-7/8 inner diameter mufflers to 1-3/4 header pipes