The FueLab 51501 is a billet-aluminium 515 Series EFI fuel pressure regulator with two -AN10 inlet ports and a -AN6 return, adjustable from 25-90 PSI (1.7-6.2 Bar).
Overview
Part of Fuelab's 515 Standard Series, the 51501 is built for high-flow EFI fuel systems and accepts both port- and non-port-style union fittings without fit issues. Fine thread-pitch adjustment gives precise control over rail pressure, and the -6AN return sits on the underside of the body for flexible mounting.
Specifications
- Application: EFI
- Minimum Pressure: 25 PSI / 1.7 Bar
- Maximum Pressure: 90 PSI / 6.2 Bar
- Inlet Port Size: 2 x AN10
- Return Port Size: AN6
- Gauge Port Size: 1/8" NPT
- Construction: Billet aluminium, anodised to MIL-A-8625 Type II
- Fuel Compatibility: Petrol, diesel, methanol, and ethanol
- Warranty: Limited lifetime warranty
Key Features
- High flow capacity for demanding EFI applications
- Two -10AN inlet ports and one -6AN return port
- Fine thread pitch for precise pressure adjustment
- Includes mounting bracket and stainless steel hardware
- 1/8" NPT gauge port with plug for an external pressure gauge
- 1/8" NPT pressure reference port with barbed fitting
How It Compares
Need the same 25-90 PSI EFI range in a smaller or lighter housing? The FueLab 53501 Mini weighs 50% less with -6AN ports, and the FueLab 59501 Ultralight weighs 30% less with -8AN ports. Running a carburettor instead of EFI? Use the FueLab 51503 (4-12 PSI) in the same -10AN housing.
FAQ
Can I use the 51501 on a carburetted engine?
No - 25-90 PSI is an EFI pressure range. For a carburetted engine, use the 4-12 PSI FueLab 51503 or the 1-3 PSI FueLab 51505 instead.
What fuels is it compatible with?
Petrol, diesel, methanol, and ethanol.
