*This listing is for an ultra rare Vintage Original HPI A959 Nitro RS4 39T Super Front One-Way Diff. Will fit the original Nitro RS4, Racer 1-2, Super Nitro RS4, and Nitro RS4 Mini as well. Please DO NOT use our pictures for your own listings. Or we will have no choice but to report the listing to eBay for copyright infringement. Thank you for your cooperation in advance.

*This front one-way diff was used on one of our Nitro RS4 Minis back in the days. It has never been abused with over-powered engines as they were raced in a small back lot only. Item looks to be in superb shape without any damages to the out-drive axles and the 39T diff gear is in awesome shape as well. Simply replace your standard stock gear differential with this unit and you’ll be turning faster lap times around the corners! One of the most sought after option parts for any your belt driven Nitro RS4 vehicles.

*Item has been long discontinued as these parts look so much better than the rest! Super adjustable for any race track! Don’t miss out on this one fellas!

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