Firestorm racers, increase the durability of your truck with our new Aluminum Rear Hub Carriers! Precision machined from billet 7075 aluminum and hard anodized for extra strength and great looks, this is a high quality factory upgrade so you’re assured of a perfect fit on all Firestorm trucks. In addition to the added durability, these 0 degree hubs allow the adjustment of the rear roll center of the truck using the included ball studs and spacers. The wheelbase is also adjustable using the included spacers. They’re laser etched to help identify the left and right blocks as well as the degree setting. Complete instructions are included.