534-244
The Holley EFI Billet Fuel Rail Kit for LS Truck Intakes is a high-flow fuel delivery upgrade for GM LS engines that need more fuel capacity than a factory-style rail can provide. Manufactured by Holley EFI, the aluminum rails feature a large 5/8" internal fuel passage and -8AN O-ring ports, giving builders the flexibility to run dual feeds, high-flow EFI pumps, aftermarket regulators, and fuels such as E85, E98, and methanol in performance LS applications.
Both rails can be fed independently or routed into a single high-flow fuel pressure regulator, making the system easy to configure around your fuel system layout. The black anodized billet construction, included mounting brackets, fittings, seals, and hardware make this a clean solution for naturally aspirated, boosted, off-road, racing, and custom LS builds using a compatible LS truck intake.
Note: Fuel injectors and fuel pressure regulator are not included.
| Specification | Details |
|---|---|
| Manufacturer | Holley EFI |
| Part Number | 534-244 |
| Product Type | EFI Fuel Rail Kit |
| Engine Family | GM LS |
| Intake Application | LS Truck Intake |
| Fuel Injection Type | Port Injection |
| Fuel System | EFI |
| Material | Aluminum |
| Finish | Bright-Dip Black Anodized |
| Fuel Passage Diameter | 5/8" |
| Rail Port Size | 3/4"-16 O-Ring / -8AN Compatible |
| Included Adapters | (4) -6AN to 3/4"-16 O-Ring |
| Dual Feed Compatible | Yes |
| External Fuel Pressure Regulator Compatible | Yes |
| Fittings Included | Yes |
| Gaskets / Seals Included | Yes |
| Fuel Injectors Included | No |
| Fuel Compatibility | Gasoline, E85, E98, Methanol and Similar EFI Fuels |
| Grade | Performance |
| UPC | 090127053454 |
| Emission Code | 5 |
Designed for compatible GM LS engines using an LS truck-style intake manifold.
| Engine Size | Displacement |
|---|---|
| 4.8L V8 | 294 CID |
| 5.3L V8 | 325 CID |
| 5.7L V8 | 346 CID |
| 6.0L V8 | 364 CID |
| 6.2L V8 | 376 CID |
| 7.0L V8 | 427 CID |
The larger 5/8" internal fuel passage provides increased fuel volume for engines with higher fuel demand. Billet rails also make it easier to configure aftermarket pumps, regulators, AN plumbing, and custom fuel system layouts.
Yes. The rail design allows each side to be supplied independently, making dual-feed fuel system configurations possible for high-flow applications.
Yes. Both rails can be routed to a single high-flow external fuel pressure regulator, giving builders control over fuel pressure and return plumbing while keeping both rails supplied.
Yes. These rails are suitable for performance fuel systems using fuels such as E85 and E98, provided the rest of the fuel system—including the pump, injectors, regulator, hoses, and seals—is compatible with the chosen fuel.
No. This kit includes the fuel rails, fittings, mounting brackets, seals, and installation hardware. Fuel injectors are selected separately so injector size can be matched to the engine's horsepower, fuel type, and intended use.
