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Holley EFIPart 300-237Made in US
Product Details
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Key Features
The versions of the LT1 Hi-Ram intake manifold with port EFI provisions and fuel rails are designed to accept Bosch Style EV-1 or GM LS7 fuel injectors
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.
LT1 Hi-Ram, Lower Manifold Only w/out Port EFI Provisions. Order Plenum Top Separately.
- Height at Plenum Flange: 9.44”
- Modular Design w/ Removable Top
- 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
- A-B Height: 12.10” (w/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing
- 3500-8000+ RPM Power Band
- Intakes w/ Injector Ports Include Fuel Rails w/ Dual Mounting (1.48” or 2.56” O-ring to O-ring injector length)
- Head Flange has Clearance for Fuel Supply to High Pressure Pump
- Fuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End
- O-Ring Seals at Cylinder Heads & Plenum Top
- Port Size: 2.06” High x 1.53” Wide
- Runner Length: Approx. 6.5”
- Rear of Plenum Machined for MAP & 3 Vacuum Ports
- Increased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner
- Large Plenum Volume of 549 Cubic Inches (w/ 1 x 95mm or 1 x 105mm Throttle Body Top)
- Several Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies
- Available With or Without Injector Ports in the Runners
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About this product
LT1 Hi-Ram, Lower Manifold Only w/out Port EFI Provisions. Order Plenum Top Separately.
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Product Specifications
Automotive Item Grade
Performance
Basic Operating RPM Range
3500-8000+
Basic Operating RPM Range
3500-8000+ RPM
Brand
Holley EFI
California Proposition 65 Chemical Name
1
California Proposition 65 Required
Yes
Carburetor Flange
N/A
Carburetor Quantity
N/A
Carburetor Studs Included
N/A
Category
Engine
CNC Ported
No
Color
Natural
Construction
Cast
Country
US
Cylinder Head Port Shape
Rectangle
Deck Height
9.24
EGR Port
No
Emission Code
3
Emission Code
4
Flange Style
N/A
Fuel Injectors Included
No
Fuel Rail(s) Included
Yes
Gasket Or Seal Included
Yes
Grade Type
Performance
HTS Code
8409915085
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 Base
Prop 65 Yes/No
Yes
Removable Runners
No
Removable Top/Lid
Yes
RPM Power Band
3500-8000+ RPM
Single Or Dual Plane Type
Single Plane
Sub Category
Cylinder Block Components
Throttle Body Bore Diameter
N/A
Throttle Body Gasket Included
No
Throttle Body Included
No
Type Of Component
Lower Manifold
Vacuum Ports
Yes
Warning
California Proposition 65
Warranty
Manufacturer's Limited 90 Day Warranty
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Warranty & Compliance
Warranty
Manufacturer's Limited 90 Day Warranty
Country of Origin
US
⚠ Prop 65 Warning
Yes
1
Emissions Code
4
HS Code
8409915085
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Dimensions & Shipping
Product Dimensions
20.4 × 14.7 × 10.0 in
Shipping Dimensions
20.4 × 14.7 × 10.0 in
Weight
8029 g (8.03 kg)