Holley Lo-Ram Intake Manifold Kit – LS3/L92 – Single Injector – Black
300-679BK
The Holley Lo-Ram Intake Manifold Kit for LS3/L92 is a low-profile EFI intake designed for serious forced-induction GM LS builds where airflow, packaging, and high-RPM performance all matter. Manufactured by Holley EFI, this black single-injector version is built for Gen III/IV LS engines using LS3/L92-style rectangular-port cylinder heads and is designed around turbocharged and supercharged combinations operating in the 3500-8000 RPM range.
The Lo-Ram’s low overall height helps builders package a top-mounted air-to-water intercooler or fit the manifold under tighter hood lines, while the removable top and modular plenum design allow flexibility in how the induction system is configured. High-volume fuel rails, a 105mm throttle body opening, and -8AN-compatible rail ports make this a strong foundation for high-horsepower LS combinations.
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 | 300-679BK |
| 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 | Black |
| 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-height top-feed design helps package an air-to-water intercooler directly above the manifold.
- Final hood, intercooler, throttle body, fuel rail, and chassis clearance must be verified before installation.
- Intake port gaskets and fuel injectors are sold separately.
Tech Insight
1. What is the Holley Lo-Ram intake designed for?
The Lo-Ram is designed around high-horsepower forced-induction LS engines that need strong airflow at higher RPM while keeping overall manifold height manageable. It is especially useful for turbo and supercharged combinations.
2. What is the benefit of the low-profile design?
The lower manifold height makes it easier to package a top-mounted air-to-water intercooler or keep the induction system under a tighter hood line. This can be a major advantage in race cars, off-road chassis, and custom engine bays.
3. What cylinder heads does this manifold fit?
This version is designed for LS3/L92 rectangular-port cylinder heads. Port shape and bolt pattern should be verified before ordering, especially on engines with aftermarket cylinder heads.
4. Does the manifold include fuel rails?
Yes. High-volume fuel rails are included, but fuel injectors are not. This version is configured for one injector per cylinder.
5. What size throttle body does the Lo-Ram use?
The plenum is designed around a 105mm throttle body. Holley lists P/N 112-581 as one compatible option, but other similar 105mm throttle bodies may also work when the bolt pattern and dimensions match.
