Didn’t get to select L or R side when ordering.
Didn’t get to select L or R side when ordering.
The hose and fittings are nice quality. Their ability to get stuff shipped out quickly dose not happen.
It took a week to get my order to shipping.
Skip to product information
Free Shipping $99+
Lifetime Warranty
Expert Support
Factory quick-connect (3/8″ feed or 5/16″ return) → Adapter → AN hose end. Pick the OEM side and AN size to match your build.
EFI Quick-Connect to AN Adapter — 3/8″ & 5/16″ to -6 / -8 AN (LS Rail / Regulator)
$37.99
Free Shipping $99+
Lifetime Warranty
Expert Support
Reliable shipping
EFI Quick-Connect to AN Adapter — 3/8″ & 5/16″ to -6 / -8 AN (LS Rail / Regulator)
Snap your factory EFI quick-connects to AN hose—no weird hacks, no leaks. Choose the exact size you need: 3/8″ feed or 5/16″ return on the OEM side, and -6 AN or -8 AN on the hose side. Perfect for LS rail connections, Corvette 58 PSI filter/reg installs, and any SAE EFI quick-connect that needs to meet AN plumbing.
Why this adapter:
- Match OEM quick-connect to AN hose for clean, serviceable plumbing
- Exact sizes for LS rails: 3/8″ feed, 5/16″ return
- Choose your hose end: -6 AN (most builds) or -8 AN (bigger flow)
How it connects
What to choose
- OEM side: LS rails are commonly 3/8″ feed and 5/16″ return.
- AN size: -6 AN suits most swaps; choose -8 AN for higher flow headroom.
Where it fits
- LS rail feed/return quick-connects
- Corvette-style 58 PSI filter/regulator ports (return-less layouts)
- Other SAE EFI quick-connect components that need to step to AN hose
Install basics
- Lightly lubricate the QC O-ring with clean engine oil.
- Push straight until you feel/hear the click; then perform a gentle tug test.
- Attach the AN flare end—no tape or sealant on 37° flares. Support the line and re-check for leaks.
Pairs perfectly with:
- Return-Less LS Fuel Line Kit & Return-Style LS Kit
- PTFE AN Hose-End Fittings
- EFI Fuel Filters (≤10 µm) & Factory-Style Filter Kit
- Hard-Line → AN Adapters (if you’re not using quick-connects)
- Install Tools
FAQs
How do I tell 3/8″ from 5/16″?
Measure the outside diameter of the hard line: 3/8″ ≈ 0.375″; 5/16″ ≈ 0.312″. Most LS rails are 3/8″ feed and 5/16″ return.
Will this fit my rail or regulator?
Yes if it uses the common SAE EFI quick-connect style. Not for flare, NPT, or spring-lock connections.
Do I need sealant?
No sealant on the quick-connect. On the AN side, 37° flares seal metal-to-metal—no tape or paste.
Install & Hose 101: