Redcat Gen8 Aluminum Front Portal Knuckle Set. These portal knuckles are an aluminum option for the Redcat Gen8, or any model equipped with Redcat Portal Axles (RER11289). These upgrades will offer improved strength and durability, and will eliminate the flex associated with the stock plastic parts. Plus, these will add approximately 40 grams of unsprung weight to the axle to help increase stability and overall performance. Package includes left and right side portal knuckles, portal knuckle covers and hardware.