- 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.
Yamaha -- WR 450 F -- (2009, 2007, 2008, 2005, 2003, 2006, 2004, 2010, 2013, 2011, 2012, 2014); Yamaha -- YFZ 450 X 4x2 -- (2005, 2013, 2007, 2015, 2004, 2016, 2006, 2008, 2010, 2012, 2011, 2014, 2009); Yamaha -- YZ 450 F -- (2008, 2009, 2007, 2005, 2006, 2003, 2004); Yamaha -- YFZ 450R 4x2 -- (2016, 2012, 2015, 2009, 2011, 2017, 2019, 2010, 2014, 2018, 2013); Yamaha -- YFZ 450R SE 4x2 -- (2011, 2017, 2013, 2012, 2014, 2016, 2018, 2015, 2019, 2010)