Knucklehead Shotgun Exhaust Systems For 1936 - 1947 PART #:411BR 725I 3"-diameter muffler clamp for

725I 3"-diameter muffler clamp for 1980–early 1985 5-speed Touring models

713DM 38"-long Slash Cut muffler set

clean installation

716BA Goose Cut drag pipes (shown on bike)

725D-1 1-1/2"-diameter clamp with tail

Knucklehead Shotgun Exhaust Systems For 1936 - 1947 PART #:411BR 725I 3"-diameter muffler clamp for1 3 4" Shotgun Exhaust Systems For 1936 1947 Knuckleheads An outside the frame front pipe, and a shotgun rear pipe that routes over the transmission, bring a modern style and a throaty sound to your 1936 1947 Knucklehead. They all have slider channels except the 34" drag pipes, which can be installed with P clamps. 729D34 34" long Slash Cut drag pipes (use Paughco #725D clamps to install) 729D40 40" long Slash Cut drag pipes (shown below on bike)