NEW SOUTHWEST SPEED STEERING U-JOINT, 3/4" DOUBLE D TO 3/4" DOUBLE D, HIGH STRENGTH BLACK OXIDE UNIVERSAL JOINT WITH NEEDLE BEARINGS, 30 DEGRESS OF USE ON STEERING SHAFT COLUMN BOX RACK Brand New Steering Universal Joint (SWS Part # 105-9181) &gt; These are brand new steering joints produced by Southwest Speed &gt; It is always a good idea to replace the universal joint when doing any work on the steering system Southwest Speed Steering Universal Joints are manufactured using the highest quality materials available, and are built to handle the abuse from high horsepower applications &gt; Replacing the universal joints is an inexpensive way to refresh the steering system &gt; NOTE: When using more than two universal joints in a system, a support heim must be used Features: &gt; High strength needle bearings &gt; Built to handle the vibrations from racing applications &gt; Working angle up to 30 degrees &gt; High quality fasteners designed for better attachment and upgraded safety *** In order to determine which u-joint you will need, you can follow these steps shown in the images *** Determine which spline is on your steering box or rack You can measure and count, or use the chart shown in the images Then, determine which steering shaft you have, or will need for your specific application (3/4" Smooth, 3/4" Double D, or 1" Double D) &gt; NOTE: Increasing a U-Joint's angle of operation beyond 30 dramatically increases the stress on the joint, weakening the entire steering mechanism &gt; If a greater angle is needed, add another u-joint