FG HF6604
Type: Three Micron Fuel Filter
This diesel fuel filter is to be used as a direct replacement for your FASS Fuel Systems HD Series Fuel Filter part number FF-1003. FASS has now discontinued this filter so when they're gone they are gone! KLM Performance has a very limited supply of the FASS diesel fuel filters so get them now!
As of 1/29/20, the FF-1003 is no longer available from FASS.
The FASS FF-1003 Fuel Filter removes more contaminants from your fuel than the FF-1010 Fuel Filter 10 Micron Fuel Filter. This FASS diesel fuel filter FF-1003 fuel filter offers the highest level of protection to your vehicle's entire fuel injection system.