- 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.
KTM -- 250 EXC -- (2009, 2010, 2008, 2011); KTM -- 250 SX -- (2011, 2010, 2008, 2009); KTM -- 250 XC -- (2011, 2010, 2009, 2008); KTM -- 250 XC-W -- (2011, 2008, 2009, 2010); KTM -- 250 MXC -- (2009, 2011, 2008, 2010)