PCV TUBE, fits stock GT cast iron manifolds, replaces Ford part number C6AZ-6758-A. Notice the main difference between the 390 tube and the 428 tube is the center fitting angle. The 390 tube is pictured sitting atop the 428 tube with the less pronounced angle. Fits all 1967-68 S code 390-4V Ford engines. You will need the related fittings for installation.