Fuel System Adapters

Fuel System Adapters: Connect AN Plumbing to Factory EFI Lines Without Cutting Corners

Fuel system adapters are the small threaded parts that let two different fuel-line standards talk to each other. On most builds you run into the same wall: your fuel rail, pump or filter uses an AN or ORB port, but the factory hard line or pump module speaks EFI quick-connect. An adapter bridges that gap so you get a clean, sealed joint instead of a hose clamp and a prayer. Get the size and thread right and the connection holds pressure without weeping; get it wrong and you chase leaks all day.

What We Stock

This category holds 7 products from 2 brands - DeatschWerks (6 of the items here) and Radium Engineering. Current in-stock pricing runs from $29 to $50, which is the live range for what is on the shelf right now rather than a fixed quote. The parts split roughly into two jobs: AN-to-EFI plumbing adapters and a fuel level sending adapter.

On the plumbing side, the DeatschWerks 6AN Male to 3/8in Female EFI Quick Connect Adapter takes a 6AN hose end into a factory-style 3/8in quick connect. If your routing needs a turn, the DeatschWerks 8AN ORB to 3/8in Male EFI 180-Degree adapter in anodized matte black lets you flip direction off an 8AN ORB port. For the sender side, the Radium Engineering Denso Fuel Level Sending Adapter handles a different problem entirely - mounting a level sender.

How to Choose

Choosing here comes down to three questions:

  • What size and thread are your ports? Match the AN size (6AN vs 8AN) and the ORB versus quick-connect end to what your rail, pump and hard line actually use. Mixing standards is exactly what these adapters solve, but you still have to buy the right pair of ends.
  • Straight or angled? A straight adapter is simplest and cheapest. The 180-degree option costs the same $49.72 but earns its place when a straight fitting would kink a hose or hit a bracket.
  • Plumbing or sending? Most of this range is fuel-line plumbing. The Radium unit is a fuel level sending adapter, so only reach for it if that's the job you're doing.

What Else You Need

Adapters rarely ship alone. Plan the whole fuel path. Browse Fittings for the AN hose ends and unions that complete the run, and the broader Adapters category if you need a size or thread combination not shown here. If the build is driving pressure and flow, pair the plumbing with Fuel Pumps. While the engine is apart, it's also the right time to look at Gasket Kits and Head Gaskets. Everything here sits under the wider Engine Components section.

Fitment Help and Ordering

These parts are sold by port size and standard, not by vehicle, so confirm your AN and quick-connect sizes before ordering. If you want a second set of eyes on your plumbing plan, call fitment help at 813-535-5801 or reach us through Contact Us. All orders ship with free shipping, and Affirm and Katapult financing is available if you're checking out via financing. Common questions are covered in the FAQ.

Fuel System Adapters: Connect AN Plumbing to Factory EFI Lines Without Cutting Corners

Fuel system adapters are the small threaded parts that let two different fuel-line standards talk to each other. On most builds you run into the same wall: your fuel rail, pump or filter uses an AN or ORB port, but the factory hard line or pump module speaks EFI quick-connect. An adapter bridges that gap so you get a clean, sealed joint instead of a hose clamp and a prayer. Get the size and thread right and the connection holds pressure without weeping; get it wrong and you chase leaks all day.

What We Stock

This category holds 7 products from 2 brands - DeatschWerks (6 of the items here) and Radium Engineering. Current in-stock pricing runs from $29 to $50, which is the live range for what is on the shelf right now rather than a fixed quote. The parts split roughly into two jobs: AN-to-EFI plumbing adapters and a fuel level sending adapter.

On the plumbing side, the DeatschWerks 6AN Male to 3/8in Female EFI Quick Connect Adapter takes a 6AN hose end into a factory-style 3/8in quick connect. If your routing needs a turn, the DeatschWerks 8AN ORB to 3/8in Male EFI 180-Degree adapter in anodized matte black lets you flip direction off an 8AN ORB port. For the sender side, the Radium Engineering Denso Fuel Level Sending Adapter handles a different problem entirely - mounting a level sender.

How to Choose

Choosing here comes down to three questions:

  • What size and thread are your ports? Match the AN size (6AN vs 8AN) and the ORB versus quick-connect end to what your rail, pump and hard line actually use. Mixing standards is exactly what these adapters solve, but you still have to buy the right pair of ends.
  • Straight or angled? A straight adapter is simplest and cheapest. The 180-degree option costs the same $49.72 but earns its place when a straight fitting would kink a hose or hit a bracket.
  • Plumbing or sending? Most of this range is fuel-line plumbing. The Radium unit is a fuel level sending adapter, so only reach for it if that's the job you're doing.

What Else You Need

Adapters rarely ship alone. Plan the whole fuel path. Browse Fittings for the AN hose ends and unions that complete the run, and the broader Adapters category if you need a size or thread combination not shown here. If the build is driving pressure and flow, pair the plumbing with Fuel Pumps. While the engine is apart, it's also the right time to look at Gasket Kits and Head Gaskets. Everything here sits under the wider Engine Components section.

Fitment Help and Ordering

These parts are sold by port size and standard, not by vehicle, so confirm your AN and quick-connect sizes before ordering. If you want a second set of eyes on your plumbing plan, call fitment help at 813-535-5801 or reach us through Contact Us. All orders ship with free shipping, and Affirm and Katapult financing is available if you're checking out via financing. Common questions are covered in the FAQ.