Holley Lo-Ram Intake Manifold Kit – LS3/L92 – Single Injector – Satin
300-679
The Holley Lo-Ram Intake Manifold Kit for LS3/L92 – Satin is a low-profile EFI intake designed for high-RPM, forced-induction GM LS combinations where airflow and packaging are both critical. Manufactured by Holley EFI, this natural-finish single-injector version fits compatible Gen III/IV LS engines using LS3/L92 rectangular-port cylinder heads and is built around turbocharged and supercharged applications operating in the 3500-8000 RPM range.
The Lo-Ram's compact height makes it easier to package a top-mounted air-to-water intercooler or fit the induction system under tighter hood lines. A removable plenum top, high-volume fuel rails, 105mm throttle body opening, and -8AN-compatible rail ports give builders a strong foundation for custom high-horsepower LS combinations while the satin aluminum finish provides a clean, raw-performance appearance.
Includes:
- (1) Holley Lo-Ram LS3/L92 Intake Manifold Base
- Top-Feed Plenum
- High-Volume Fuel Rails
- Fuel Rail Mounting Hardware
- Required Manifold Mounting Hardware
- Throttle Body Gasket
- Required Seals
Note: Throttle body, fuel injectors, intake port gaskets, intercooler, and additional fuel system plumbing are not included.
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Holley EFI |
| Part Number | 300-679 |
| Product Type | EFI Intake Manifold Kit |
| Manifold Series | Lo-Ram |
| Engine Family | GM Gen III / IV LS |
| Cylinder Head Application | LS3 / L92 Rectangle Port |
| Recommended Use | Forced Induction |
| Operating RPM Range | 3500-8000 RPM |
| Construction | Cast Aluminum |
| Finish | Satin / Natural Aluminum |
| Manifold Type | Single Plane |
| Injector Configuration | Single Injector per Cylinder |
| Fuel Rails Included | Yes |
| Fuel Injectors Included | No |
| Fuel Rail Ports | 3/4"-16 O-Ring / -8AN Compatible |
| Throttle Body Bore | 105mm |
| Throttle Body Included | No |
| Throttle Body Gasket Included | Yes |
| Inlet Location | Top |
| Removable Top / Lid | Yes |
| Removable Runners | No |
| Cylinder Head Port Shape | Rectangle |
| Deck Height | 9.24" |
| Base Manifold Height | 5.67" |
| Top-Feed Height Without Intercooler | 9.25" |
| Top-Feed Height With Intercooler | 9.25" + Intercooler Thickness |
| Vacuum Ports | Yes |
| Intake Port Gaskets Included | No |
| Emission Code | 3 |
Fitment
Designed for compatible GM Gen III / IV LS engines using LS3/L92-style rectangular-port cylinder heads.
| 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 |
Fitment Notes
- Requires LS3/L92-style rectangular-port cylinder heads; engine displacement alone does not guarantee fitment.
- Designed primarily for turbocharged and supercharged engine combinations.
- Recommended operating range is approximately 3500-8000 RPM, depending on the complete engine combination.
- Designed around a 105mm throttle body such as Holley P/N 112-581 or a similar compatible unit.
- The low-profile top-feed design helps package an air-to-water intercooler above the manifold.
- Works with compatible OE and aftermarket LS3/L92-style cylinder heads.
- Final hood, intercooler, throttle body, fuel rail, and chassis clearance should be verified before installation.
- Intake port gaskets and fuel injectors are sold separately.
Tech Insight
1. What is the difference between this Lo-Ram and the black 300-679BK?
The primary difference is the finish. P/N 300-679 has a satin natural-aluminum finish, while P/N 300-679BK uses a black finish. Both use the same LS3/L92 single-injector Lo-Ram architecture.
2. Why is the Lo-Ram designed for forced-induction LS engines?
The short-runner, high-flow design is intended to support engines making power higher in the RPM range. That makes it particularly well suited to turbocharged and supercharged combinations where airflow demand can increase significantly as boost and engine speed rise.
3. What is the advantage of the low-profile manifold?
The compact base height gives builders more room for a plenum-mounted air-to-water intercooler while helping control total induction-system height. This is useful in tight engine bays, race cars, off-road chassis, and builds with limited hood clearance.
4. Does this manifold include the fuel rails?
Yes. High-volume fuel rails are included and this version is configured for one injector per cylinder. Fuel injectors are selected separately to match horsepower, fuel type, and boost level.
5. What throttle body should I use with this manifold?
The plenum is designed around a 105mm throttle body. Holley lists P/N 112-581 as one compatible option, but another 105mm throttle body may work when its mounting pattern and dimensions match the manifold.
