ISR Performance - Aluminum Driveshaft - Nissan 240SX LS SwapISR 240SX with LS T56 Aluminum Shaft. This is ISR single shaft conversion for the 240SX platform. This is a complete 6061 T6 aluminum shaft that is about 1 2 the weight of the factory 2 piece. The shaft features larger, replaceable and greaseable u joints and can handle about 650WHP. By removing the factory 2 piece shaft and installing a single shaft the car will feel more responsive due to the fact the hanger bearing is not moving up and down during