Drag Pipes For 1948 - 1969 Generator Big Twin Engines With S.T.D. Cylinder Heads In Rigid Or Swingarm Frames axles and accessories The 5-1/2" center width works

The 5-1/2" center width works for all stock risers on 3-1/2" centers

they will not fit rigid frames with mechanical brakes

The use of heat shields is highly recommended

The front pulley has the correct taper for the 45" engine shaft

724D1M 38"-long Slash Cut muffler set_

Drag Pipes For 1948 - 1969 Generator Big Twin Engines With S.T.D. Cylinder Heads In Rigid Or Swingarm Frames axles and accessories The 5-1/2" center width works1. 3 4 Drag Pipes For 1948 1969 Generator Big Twin Engines With S. T. D. Cylinder Heads In Rigid Or Swingarm Frames These 40" long Slash Cut drag pipes are specifically intended for use on engines with Panhead or Shovelhead lower ends and STD cylinder heads. Because of the unique 3 bolt exhaust flange incorporated into the S. T. D. heads, they require special exhaust systems. We have taken some of our most popular drag pipe sets for 19481969 rigid and