FLH 1999 - 2008 Installation Guides Keep Your Harley Running Cooler with UltraCool The New FLH Installation Guide 2.0 Version with Relay Harness as of March 1, 2018 Download The NEW FLH Installation Guide as of October 1st 2016 Download The Installation Guide (Prior to October 1st 2016) Step By Step Hose Installation Steps Step By Step Adapter Key Install Steps Video Installation Guides