Parts Geek - For 2007 Workhorse R26 Thermostat API 55563RB. 2007 Workhorse R26 8.1L V8. 2007 Workhorse R26 6.7L 6 Cyl. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
