2008-2010 FORD 6.4L POWER STROKE DIESEL NEW INJECTOR FUEL LINE TUBEAs per Ford Expert Service Recommendation, you should always replace your old 6.4l injector fuel lines tubes after you have removed your old units out.Reference Number:8C3Z9229A**California Proposition 65 Warning:Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.Visit:www.p65warnings.ca.gov