The 1-piece aluminum driveshaft for the Scion FR-S and Subaru BRZ is a complete 6061-T6 3" aluminum shaft that is approximately 1/2 the weight of the factory 2-piece driveshaft. The 1-piece aluminum shaft features larger, replaceable and greaseable u-joints. By removing the factory 2-piece shaft and installing a single shaft the car will feel more responsive due to the lighter weight of the shaft and also the fact that the hanger bearing is not moving up and down during acceleration.
The Driveshaft Shop Aluminum Driveshaft Weight is 13.2lbs. Stock is 24.2lbs