GM 10.5" 14 Bolt Axle Pinion Driveshaft Flange 1310 / 1350 / 1410 Series 2.680" Male Pilot Rectangle Pattern
Ultimate Dana 60 / Dana 70 Axle Pinion Driveshaft Flange 1310 / 1350 / 1410 Series 3.75" Female Pilot Square Pattern