Diamond Power Intake & Exhaust Valves works with Hyundai Accent Kia Rio Rio5 1.6L DOHC L4 16v G4ED 01-09 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 01-09 Hyundai Accent 1.6L DOHC L4 16v G4ED Engine Valves are made with excellent quality materials (Nickel, Chrome and Tungsten) 2001-2009 Hyundai Accent 1.6L DOHC L4 16v G4ED 2006-2010 Kia Rio 1.6L DOHC L4 16v G4ED 2006-2010 Kia Rio 5 1.6L DOHC L4 16v G4ED Head Diameter: 1.110&#034; -28.19mm Length: 3.485&#034; -88.51mm Stem Diameter: 0.2345&#034; -5.95mm Face Angle: 45 Head Diameter: 0.984&#034; -24.99mm Lenght: 3.638&#034; -92.40mm Stem Diameter:0.2339&#034; -5.94mm Face Angle:45