Valve GuideCaracteristicas: All valve guides are made of Ampco 45, a high performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance Keepers are not included Made in the U. S. A. Peso: 0. 1 Alto: 0. 5 Largo: 4. 0 Ancho: 3. 5 Aditamentos: YZF R1 : 1999 2000 2003 1998 2002 2001 Specs: Inside Diameter: 0,1757" Outside Diameter: 0,3955" Product Name: Valve Guide Riding Style: Street Units: Each