From HPI Racing:
Get more power to the wheels of your Sport 3 with an Aluminum Center Drive Shaft fitted!
The 6061 Aluminum Shaft is a direct replacement for Sport 3 cars. Coming in at just 12 grams compared to the standard steel shaft at 35g, the Aluminum Shaft significantly reduces the rotating mass for improved acceleration, braking and a true rotation down the narrow sport 3 center channel.
It’s built to exact HPI factory specifications for a perfect “bolt-in” fit and anodized in HPI Orange color for a great looking finish.