ProX steel valves are manufactured of premium grade steel to exact OEM specifications and tolerances. Manufactured by the leading OEM factories in Japan and are a direct and cost-efficient OEM replacement. ProX steel valves can be used in combination with all the OEM valve train components like valve springs, guides, bases and retainers. Fits: Suzuki DR-Z 400 2000-2012, LT-Z 400 2003-2012; Kawasaki KLX 400 R 2003, KFX 400 2003-2006. Specs: Location: Intake; Material: Steel; Number of Valves Included: 1; Head Dia: 36.00mm; Length: 82.50mm; Stem Dia: 5.00mm.