1977-1978 GMC C25 5.7L V8. 1976-1978 GMC C25 6.6L V8. 1975-1978 GMC C25 7.4L V8. 1975-1976 GMC C25 5.7L V8 4BBL. Notes: Air Cleaner Mounting Gasket -- 5-1/32in I.D. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
