[Build-It-Break-it]

The differences are the brackets that mount the torque arm to the center section of the 12 bolt housing. You'll have to get a bracket from speedtech for the back of your 12 bolt housing and the front bracket as well that bolts to the pinion mount (its two pieces ). You'll also possibly have to grind some of the webbing off of the pinion to bolt up the front two piece bracket. Everything else will weld up to your 12 bolt housing.