Heavy Duty Electric Fuel Pump For 1973 Audi 100 Series Knockout Straight Swap Gas Delivery Part Hassle Free Install Ride Upgrade Kit Bulletproof Performance

Heavy duty single pack fuel pump for gas delivery swaps
✔️ Single unit P90021 electric fuel pump ready to install

You get a single pre-tested electric fuel pump designed for steady gas delivery. Drop it into your 1973 Audi 100 Series build for smoother idle and faster throttle response. The direct bolt-in layout saves garage time so you focus on driving. Reliable cross references like Airtex E8016S and Delphi FD0037 confirm the internal design quality. This handy upgrade takes the guesswork out of filling up the tank.

✅ Part number: P90021 single pack unit
✅ Direct swap for 1973 Audi 100 Series engines
✅ Accepts Airtex, Onix, and Autobest cross references
✅ Handles continuous gas flow for street and track use
✅ Includes matching grommets and hose clamps

💡 What are the best practices for swapping a heavy duty electric fuel pump in classic cars?

Consistent gas flow keeps your carburetor fed without faltering.

- Route power cables through insulated grommets to prevent short circuits

- Seal line connections tightly to avoid air leaks and suction loss

- Test voltage drops across the relay before mounting the hardware

- Inspect the intake strainer radius for smooth liquid entry

Picking the right hardware makes your upgrade handy on weekend runs.

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