Our CNC-machined billet driveshaft adapter allows you to bolt a 1350 series driveshaft to the OEM 3-finger differential flange. Adapter mates to Spicer 3-2-119 companion flange that is commonly used in aftermarket driveshafts. GForce adapters are drilled for larger 7/16×20 bolts, all hardware included. Note: Driveshaft adapters are not replacements for guibo joints; They are for adapting to an off the shelf 4 bolt U-joint flange