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Upgrades that replace Traxxas #8578
1 aftermarket part sold as a replacement for Traxxas part #8578, 1 in stock now. Each card quotes the maker’s own fitment note; check it against your model before ordering.
TUDR9333F
Hot Racing UDR Steel Helical Diff Ring and Pinion Front Gear, 33/13T
$33.88In stock
“Replaces TRA 8578” — Hot Racing’s description