Corvette-Style 58 PSI Filter/Regulator — LS Swap (Includes AN-6 Adapters)

The simplest path to a return-less LS: regulate to ~58 PSI at the tank, run a single AN-6 feed to the rail, and send excess fuel right back to the tank. This unit combines a fixed-pressure regulator and EFI filter in one body and ships with AN-6 adapters for all three ports (IN, OUT, RETURN) for clean, leak-free plumbing.

✅ Fixed ~58 PSI for Gen III/IV LS
✅ IN / OUT / RETURN clearly labeled
✅ Includes -6 AN adapters (all ports)
✅ Ideal for return-less layouts
✅ Mounts near tank to reduce heat & noise

How it plumbs (return-less)

Pump → IN (on this filter/regulator).
OUT → Rail feed (single AN-6 line to engine bay).
RETURN → Tank (short return line at the rear).

Flow (top lanes): FEED 3/8″ from sending unit → Filter/Reg IN • OUT → rail • RETURN 5/16″ → tank.

Specs & guidance

Base pressure: ~58 PSI (typical Gen III/IV LS)
Ports: IN / OUT / RETURN — supplied with -6 AN ends
Native Corvette QC sizes: 3/8″ feed/outlet, 5/16″ return
Placement: mount near the tank on the frame; follow arrow for flow direction
Filtration: Use a ≤10 µm EFI filter. For stock/near-stock flow, see our Factory-Style Inline Filter Kit (AN-6); for higher flow, shop the Fuel Filters collection.
Fuel compatibility: gasoline; confirm element choice if running E85

Pairs perfectly with

Return-Less LS Fuel Line Kit (PTFE AN-6) — single feed to the rail; clamps & fittings included.
AN adapter fittings — sending-unit and tank return ports.
Install tools — cutter, vise jaws, and AN wrenches.

Install instructions & Hose 101

Installation hub — mounting tips & routing diagrams.
PTFE hose & AN fittings — step-by-step
AN Hose 101 articles — regulators, filters, routing fundamentals.

FAQs

Is this the right choice for my LS?

Yes for most Gen III/IV return-less swaps targeting ~58 PSI. It simplifies plumbing and keeps the bay clean. If you run a very large pump or big boost, step up to a true return-style regulator.

Where should I mount it?

Near the tank on the frame rail. Keep lines supported with cushioned clamps and protected from heat/road debris. Follow the arrow for flow direction.

What hose size?

Most swaps use -6 AN feed to the rail. Planning future power? Consider a larger feed or a return-style regulator to increase bypass capacity.