I contacted RSS and asked them about this. Below is their reply:
The resulting noise from using a single mass aluminum flywheel will not be reduced by using a dampened pulley. The only way to eliminate the chatter is to go back to a dual mass or heavier flywheel. A dampened crankshaft pulley is designed to dampen engine harmonics. The resulting chatter is from the transmission, hence the pulley will not make a significant reduction in Gear Chatter.
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