|
the OEM piece is a harmonic damper, i.e., a steel inner part and the outer part (pulley) with about an eighth-inch thick layer of bonded rubber joining them. The failure mode is for the rubber to give it up over time due to heat, etc. and the pulley separates from the inner part (that bolts to the crankshaft.
Dayle's replacement (and other like pieces) is to use a single piece aluminum pulley. You lose the harmonic damper action. Nobody seems to know how bad this will be in the long run. I only have about 75 miles on mine so the only aspect I can comment on is fit & finish (which is great).
|