- 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
- Made in the U.S.A.
Honda -- TRX300EX Sportrax -- (2003, 2001, 2005, 2002, 2004); Honda -- TRX300EX FourTrax -- (2000, 1999, 1998, 1996, 1993, 1994, 1995, 1997); Honda -- TRX300X -- (2009); Honda -- XR250L -- (1994, 1996, 1991, 1995, 1992, 1993)