The TRF420 chassis is a thoroughbred racing chassis, and now you have even more setup options with this aluminum lower deck, which is perfect on high-grip circuits. - TRF420 Aluminum Lower Deck x1 - Crafted in 2mm thick aluminum, this deck maintains excellent rigidity, with optimal flex provided by the large diagonal slits in the center. - Black anodized finish. - Recommended for use with the carbon fiber upper deck in Item 42349. - Compatible with TRF420 chassis cars.