Redcat Gen8 Aluminum Portal Center Gearbox Housing. This aluminum option is compatible with 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 60 grams of unsprung weight to the axle to help increase stability and overall performance. Package includes center pumpkin, right side axle tube, left side axle tube and hardware.