This is the JConcepts Kraton 6S BLX Aluminum Rear Chassis Brace. This durable option part adds strength and rigidity to the Kraton 6S BLX chassis. Constructed from high quality 7075 CNC machined aluminum and anodized with a durable black finish this brace can handle the extreme conditions the Kraton is known for running in. This is a direct replacement and uses the stock hardware included with the chassis.