HPI Racing A930 Nitro RS4/Racer/RTR Carbon Fiber Graphite Upper Radio Tray Deck & Accessories. This listing is for a Super Rare and vintage HPI Racing A930 Nitro RS4/Racer/RTR Carbon Fiber Graphite Upper Radio Tray Deck & Accessories. Brand new and never used in original HPI Hobby Products International Japan INC. This would definitely stiffen up […]