Accufab's 65mm throttle body and spacer was designed to be used on the 1986-1993 Ford 5.0L Mustang. These products are made from high quality billet aluminum, no castings or coatings! Each billet part is CNC machined and then the exterior aluminum is polished to a mirror finish. The shafts are CNC machined from stainless steel and we use only the best bearings, bushings, screws and other component parts available.