This damper is supplied as a neutral balance damper with two counterweights. This feature, coupled with extra TDC marks, allows one part number to fit all BB Chryslers including 351, 361, 383, 400, 413, 426 and 440 including 426 Hemi (which requires 81013 pulley spacer). Will not fit 331, 354, 392 early Hemi. Complete fitment instructions come with the damper.

This damper is supplied as a neutral balance damper with two counterweights. This feature, coupled with extra TDC marks, allows one part number to fit all BB Chryslers including 351, 361, 383, 400, 413, 426 and 440 including 426 Hemi (which requires 81013 pulley spacer). Will not fit 331, 354, 392 early Hemi. Complete fitment instructions come with the damper. A tube of thread sealant is included.