Holley- 300-143 Holley Hi-Ram Intake Manifold - GM LT1
GM Gen V LT1 Hi-Ram, 1 x 92mm LS Throttle Body (Longitudinal Mount) w/out Port EFI Provisions
The new Holley EFI Hi-Ram intake provides the ultimate performance with the new GM direct injected Gen V 6.2L LT1 engine. The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems. Each runner has a large radius where it meets the plenum, and optimized taper & cross-sectional area to perform in a wide variety of engine configurations. The optional injector bosses on the intake runners allow increased performance potential by using additional injectors along with the factory direct injection. When you look for the pinnacle of performance, price, and quality, look to Holley EFI.
Features:
- A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
- Available With or Without Injector Ports in the Runners
- Port Size: 2.06” High x 1.53” Wide
- 3500-8000+ RPM Power Band
- Rear of Plenum Machined for MAP & 3 Vacuum Ports
- Head Flange has Clearance for Fuel Supply to High Pressure Pump
- Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
- Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48” or 2.56” O-ring to O-ring injector length)
- Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
- Runner Length: Approx. 6.5”
- Easy Assembly w/ Top Mounted Screws on Plenum Top (all except front 2 screws)
- Overall Height: 13.34” (w/ EFI Top - 95mm or 105mm) – See Drawing
- Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
- Height at Plenum Flange: 9.44”
- Modular Design w/ Removable Top
- Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
- O-Ring Seals at Cylinder Heads & Plenum Top
| 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 | Rectangle |
| Deck Height | 9.24 IN |
| EGR Port | No |
| Emission Code | 4 |
| Engine | GM Gen V LT1 |
| Flange Style | EFI |
| Fuel Injectors Included | No |
| Fuel Rail(s) Included | Yes |
| Gasket Or Seal Included | Yes |
| Grade Type | Performance |
| Intake Port Gasket(s) Included | No |
| Manifold Type | Hi-Ram |
| Material | Aluminum |
| Nitrous Bung(s) Included | No |
| Part Type | Engine Intake Manifold |
| Plenum Finish | Natural |
| Product Type | Intake Manifold |
| Removable Runners | No |
| Removable Top/Lid | Yes |
| Single Or Dual Plane Type | Single Plane |
| Sub Category | Cylinder Block Components |
| Throttle Body Bore Diameter | 92 MM |
| Throttle Body Gasket Included | Yes |
| Throttle Body Included | No |
| Vacuum Ports | Yes |
| Warranty | Manufacturer's Limited 90 Day Warranty |
| UPC | 090127730546 |
| Part Number | 300-143 |
