Holley- 300-227 Hi-Ram Lower Manifold - GM LS1/LS2/LS6
LS1/LS2/LS6 Cathedral Port EFI Base Only
The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as an alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more. • Cast aluminum construction • Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range with max power at 7000-8000+RPM • Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations • The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and for builders and fabricators as the foundation for custom induction systems. • EFI fuel rails are machined for -8AN O-ring fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits
Features:
- Silver color
- Mounting Flange Gasket Type - Standard LS3 Molded O-ring
- Port Size - 2.49” H x 1.21” W
- Plenum Top Gasket Type - 3/32” Round O-ring Cord
- Runner Length - 6.58” As-Cast Runner Cross-Sectional Area - Tapered 4.25 in² to 2.53 in²
| Basic Operating RPM Range | 3500-8000 RPM |
|---|---|
| Brand | Holley EFI |
| Carburetor Flange | N/A |
| Carburetor Quantity | N/A |
| Carburetor Studs Included | N/A |
| Category | Engine |
| CNC Ported | No |
| Color | Natural |
| Construction | Cast |
| Cylinder Head Port Shape | Cathedral |
| Deck Height | 9.24 IN |
| EGR Port | No |
| Emission Code | 4 |
| Engine | GM LS1/LS2/LS6 |
| Flange Style | N/A |
| Fuel Injectors Included | No |
| Fuel Rail(s) Included | Yes |
| Fuel System Type | EFI |
| Gasket Or Seal Included | Yes |
| Grade Type | Performance |
| Intake Port Gasket(s) Included | No |
| Material | Aluminum |
| Nitrous Bung(s) Included | No |
| Part Type | Engine Intake Manifold |
| Plenum Finish | Natural |
| Product Type | Intake Manifold Base |
| Removable Runners | No |
| Removable Top/Lid | Yes |
| Single Or Dual Plane Type | Single Plane |
| Sub Category | Cylinder Block Components |
| Throttle Body Bore Diameter | N/A |
| Throttle Body Gasket Included | N/A |
| Throttle Body Included | No |
| Type of Component | Lower Manifold |
| Vacuum Ports | Yes |
| Warranty | Manufacturer's Limited 90 Day Warranty |
| UPC | 090127681725 |
| Part Number | 300-227 |
