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Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They are offered with two port sizes, 3/8" NPT or 6AN to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way.
Holley Adjustable Billet By-Pass Regulator-3/8" NPT 12-879
Specifications:
| 40 | Yes |
| Brand | Holley |
| Category | Air and Fuel Delivery |
| Color | Black |
| Emission Code | 5 |
| Fuel System | EFI/Carb |
| Fuel Type | Gasoline |
| Gauge Port | Yes |
| 3390 | Performance |
| Inlet Port Diameter | 3/8 |
| Inlet Quantity | 1 |
| Inlet Size | 3/8 inch NPT |
| 596 | NPT |
| Material | Aluminum |
| Mounting Hardware Included | Yes |
| 90 | Inline |
| Outlet Port Diameter | 3/8 |
| Outlet Quantity | 1 |
| Outlet Size | 3/8 inch NPT |
| 598 | NPT |
| part type | Fuel Pressure Regulator |
| 890 | 3 |
| Product Type | Fuel Pressure Regulator |
| Return Size | 3/8 inch NPT |
| Style | Bypass |
| Sub Category | Carburetion |
| Warning | California Proposition 65 |
| Warranty | Manufacturer's Limited 90 Day Warranty |
| 40 | Yes |
| Brand | Holley |
| Category | Air and Fuel Delivery |
| Color | Black |
| Emission Code | 5 |
| Fuel System | EFI/Carb |
| Fuel Type | Gasoline |
| Gauge Port | Yes |
| 3390 | Performance |
| Inlet Port Diameter | 3/8 |
| Inlet Quantity | 1 |
| Inlet Size | 3/8 inch NPT |
| 596 | NPT |
| Material | Aluminum |
| Mounting Hardware Included | Yes |
| 90 | Inline |
| Outlet Port Diameter | 3/8 |
| Outlet Quantity | 1 |
| Outlet Size | 3/8 inch NPT |
| 598 | NPT |
| part type | Fuel Pressure Regulator |
| 890 | 3 |
| Product Type | Fuel Pressure Regulator |
| Return Size | 3/8 inch NPT |
| Style | Bypass |
| Sub Category | Carburetion |
| Warning | California Proposition 65 |
| Warranty | Manufacturer's Limited 90 Day Warranty |
| Description_INV | BILLET BYPASS REG, 4-65 PSI (3/8 NPT) |
| Description_DES | Adjustable Billet By-Pass Regulator-3/8" NPT |
| Description_EXT | Adjustable billet by-pass return style fuel pressure regulator 3/8" NPTBoost Reference - 1:1 |
| Description_MKT | Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They are offered with two port sizes, 3/8" NPT or 6AN to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way. |
| Description_FAB | Adjustable from 4-65 psi for precise fuel pressure adjustments |
| Description_FAB | Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks |
| Description_FAB | Used in systems with a return line back to the tank |
| Description_FAB | (1) 3/8” NPT Inlet; (1) 3/8” NPT Outlet; and (1) 3/8” NPT Return Port |
| Description_FAB | Includes fitting for manifold reference |
| Description_FAB | Includes an 1/8 NPT gauge port |
| Description_FAB | Boost Reference - 1:1 |
| Description_FAB | The 4-15 psi carbureted spring comes installed in the regulator |
| Description_FAB | Compatible with diesel fuel and E85 |
| Description_INV | BILLET BYPASS REG, 4-65 PSI (3/8 NPT) |
| Description_DES | Adjustable Billet By-Pass Regulator-3/8" NPT |
| Description_EXT | Adjustable billet by-pass return style fuel pressure regulator 3/8" NPTBoost Reference - 1:1 |
| Description_MKT | Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They are offered with two port sizes, 3/8" NPT or 6AN to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way. |
| Description_FAB | Adjustable from 4-65 psi for precise fuel pressure adjustments |
| Description_FAB | Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks |
| Description_FAB | Used in systems with a return line back to the tank |
| Description_FAB | (1) 3/8” NPT Inlet; (1) 3/8” NPT Outlet; and (1) 3/8” NPT Return Port |
| Description_FAB | Includes fitting for manifold reference |
| Description_FAB | Includes an 1/8 NPT gauge port |
| Description_FAB | Boost Reference - 1:1 |
| Description_FAB | The 4-15 psi carbureted spring comes installed in the regulator |
| Description_FAB | Compatible with diesel fuel and E85 |