Extra lightweight alloy spur gear mount for the HPI RS4 Sport 3. All alloy construction weighs only 2.6gr- the stock steel mount is 8.4gr! Less rotating mass means longer run times, a cooler motor and faster power delivery.

Accepts the stock spur gear or aftermarket 2 bolt or 4 bolt pattern spur gears by Kimbrough and HPI etc.

Polished and anodized in factory orange.

Optional alloy drive shaft also available.

$16.95 MSRP