Rack and Pinion: Knuckle Connection Shaft 22mm, 27% diameter increase over OE shafts. Spline Diameter is 18.8mm, 25% larger than OE spline. Number of Turns 3.33 vs OE 3.16 Connection shaft threads 5/8 -18 vs OE 1/2 -13 Driving torque 1.5NM vs OE 1.3NM Durable powder-coated housing. Black E-Coat for corrosion and chip resistance. All Hardware Included. Easy install. Steering Shaft: Super heavy-duty connection Shaft Approximately 10% increase in U-Joint Bearing Diameter (9.375%) Hot Forged U-Joint Yokes E-Coated ΓÇô High Scratch and Corrosion Resistance Use OE Mounting Hardware.