FUELAB 565 Series Fuel Pressure Regulators have all of the same great features as the 515/525 Series but with significantly increased capacity. Utilising a ½” return orifice and -10AN ports, this regulators hold no bounds. With a bypass capability over 19 litres per minute at 5 PSI, this regulator suitable for blow through carbureted applications well over 1800 HP and for EFI applications using belt driven fuel pumps. Available in four different pressure ranges covering applications between 4 and 80 PSI.
10AN Inlets / -10AN Return / XL Seat
Regulator Features
- Two -10AN inlet ports and one -10AN return port
- 1.75” sized diaphragm with 1/2” return orifice
- Gasoline, diesel, methanol, and ethanol fuel compatible
- Billet Aluminum with anodize per military MIL-A-8625, Type II
- Fine thread pitch for precise pressure adjustment
- Versatile mounting bracket and stainless steel hardware
- 1/8” NPT gauge port with plug for external pressure gauge
- 1/8” NPT pressure reference port with barbed fitting
- Backed by a limited lifetime warranty
Pressure Options:
These regulators are available in five pressure ranges:
Model |
Appox. Pressure Range |
Approx. Flow Capacity |
Regulation Slope |
56501-C |
25-65 PSID (1.7-4.5 Bar) |
8.0 GPM (1800 LPH) |
< 1 PSI/GPM |
56502-C |
4-12 PSID (0.28-0.82 Bar) |
5.0 GPM (1100 LPH) |
< 0.5 PSI/GPM |
56503-C |
10-25 PSID (0.7-1.7 Bar) |
5.0 GPM (1100 LPH) |
< 1 PSI/GPM |
56504-C |
40-85 PSID (2.75-5.8 Bar) |
8.0 GPm (1800 LPH) |
2.3 PSI/GPM |