Diamond Power Intake & Exhaust Valves works with Ford Explorer Ranger Mustang Mazda B4000 Mercury Mountaineer 4.0L SOHC V6 12v VINS -E-K-N 2001 02 03 04 05 06 07 08 09 2010 11 2 Year Warranty (This product must be installed by a certified professional mechanic) Same day shipping when purchased before 3pm EST Our products are tested and meet or exceed OEM performance requirements Fits 01-11 Ford Ranger 244 4-0L SOHC V6 12v VINS -E-K-N- Engine Valves are made with excellent quality materials (Nickel, Chrome and Tungsten) 1997-2009 Ford Explorer 244 4.0L SOHC V6 12v VINS &#034;E,K,N&#034; 1997-2009 Mercury Mountaineer 244 4.0L SOHC V6 12v VINS &#034;E,K,N&#034; 2001-2011 Ford Ranger 244 4.0L SOHC V6 12v VINS &#034;E,K,N&#034; 2005-2008 Ford Mustang 244 4.0L SOHC V6 12v VINS &#034;E,K,N&#034; 2001-2008 Mazda B4000 4.0L SOHC V6 12v VIN &#034;E&#034; Head Diameter: 1.811&#034; -45.99mm Lenght: 4.524&#034; -114.91mm Stem Diameter: 0.2745&#034; -6.97mm Face Angle: 45 Head Diameter: 1.535&#034; -38.98mm Lenght: 4.622&#034; -117.39mm Stem Diameter:0.274&#034; -6.96mm Face Angle:45