CARB Executive Order · Other Engine Part
EO D-550-46
Advanced Flow Engineering · DFS780 and DFS780 Pro Fuel Systems
- Executed
- September 2020
- Rows shown
- —
- PDF pages
- 3
We show basic details only for this EO. Its table layout did not match the columns we can read with certainty, so we do not copy it. Check the vehicles and part numbers in the original PDF.
What the EO says about the part
The DFS780 Fuel System is an add-on diesel fuel lift pump with integrated fuel filter and water separator that is designed to be installed on the frame rail of the truck near the fuel tank, in series between the fuel tank and the factory fuel lift pump. The add-on part is designed to work with the stock fuel pump and regulator. The system is sold in two configurations. In one configuration the DFS780 runs anytime the factory fuel lift pump runs.
Quoted from EO D-550-46. The EO exempts the part from California Vehicle Code Section 27156 only for the vehicles it lists.
More EOs from Advanced Flow Engineering
All 61 Advanced Flow Engineering EOs we read All vehicles with an EO-listed other engine partSource: CARB Executive Order D-550-46 (PDF), retrieved November 11, 2026. EOs can be amended, superseded or revoked; CARB's copy is the authority. Independent reference, not affiliated with CARB.