
Holley 300-123BK Hi-Ram EFI Intake Manifold GM LS1/LS2/LS6, Black
Holley designed this 300-123BK Black Hi-Ram EFI Intake Manifold for 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads. It is 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. The runner length and tapered cross-section come designed to perform well for a wide range of engine configurations.
The included Black anodized EFI fuel rails comes machined for -8AN O-ring fittings, with passages large enough to accomodate high fuel flows as well as dampen pressure pulsations in the fuel system. The modular base also accepts a wide range of EFI and carbureted tops, and the Plenum Top Gasket Type is 3/32” Round O-ring Cord.
Holley 300-123BK Black Hi-Ram EFI Intake Manifold Features:
- Fits: 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads
- Style: Single Plane
- RPM Range: 3500-8000
- Throttle Body Bore Diameter: 105 mm
- Manifold Front Height: 12.32 in.
- Manifold Rear Height: 11.000 in.
- Port Size: 2.49 in. Height x 1.21 in. Width
- Runner Length: 6.58 in.
- Deck Height : 9.24 in.
- Multi-Port Fuel Rails Included: Yes
- Injectors Included: No
- Throttle Body Included: No
- EGR Port: No
- Material: Aluminum
- Finish: Black
- Quantity: Sold Individually
Emissions:
This part is legal for sale or use on Racing Use Only Vehicles that are used exclusively for competition that are not registered and that may also never be used on the street.
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
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Holley 300-123BK Hi-Ram EFI Intake Manifold GM LS1/LS2/LS6, Black
Holley designed this 300-123BK Black Hi-Ram EFI Intake Manifold for 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads. It is 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. The runner length and tapered cross-section come designed to perform well for a wide range of engine configurations.
The included Black anodized EFI fuel rails comes machined for -8AN O-ring fittings, with passages large enough to accomodate high fuel flows as well as dampen pressure pulsations in the fuel system. The modular base also accepts a wide range of EFI and carbureted tops, and the Plenum Top Gasket Type is 3/32” Round O-ring Cord.
Holley 300-123BK Black Hi-Ram EFI Intake Manifold Features:
- Fits: 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads
- Style: Single Plane
- RPM Range: 3500-8000
- Throttle Body Bore Diameter: 105 mm
- Manifold Front Height: 12.32 in.
- Manifold Rear Height: 11.000 in.
- Port Size: 2.49 in. Height x 1.21 in. Width
- Runner Length: 6.58 in.
- Deck Height : 9.24 in.
- Multi-Port Fuel Rails Included: Yes
- Injectors Included: No
- Throttle Body Included: No
- EGR Port: No
- Material: Aluminum
- Finish: Black
- Quantity: Sold Individually
Emissions:
This part is legal for sale or use on Racing Use Only Vehicles that are used exclusively for competition that are not registered and that may also never be used on the street.
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!
Product Information
Product Information
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Shipping & Returns
Description
Holley designed this 300-123BK Black Hi-Ram EFI Intake Manifold for 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads. It is 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. The runner length and tapered cross-section come designed to perform well for a wide range of engine configurations.
The included Black anodized EFI fuel rails comes machined for -8AN O-ring fittings, with passages large enough to accomodate high fuel flows as well as dampen pressure pulsations in the fuel system. The modular base also accepts a wide range of EFI and carbureted tops, and the Plenum Top Gasket Type is 3/32” Round O-ring Cord.
Holley 300-123BK Black Hi-Ram EFI Intake Manifold Features:
- Fits: 1997-2017 GM LS1, LS2, as well as LS6 engines with Cathedral Port cylinder heads
- Style: Single Plane
- RPM Range: 3500-8000
- Throttle Body Bore Diameter: 105 mm
- Manifold Front Height: 12.32 in.
- Manifold Rear Height: 11.000 in.
- Port Size: 2.49 in. Height x 1.21 in. Width
- Runner Length: 6.58 in.
- Deck Height : 9.24 in.
- Multi-Port Fuel Rails Included: Yes
- Injectors Included: No
- Throttle Body Included: No
- EGR Port: No
- Material: Aluminum
- Finish: Black
- Quantity: Sold Individually
Emissions:
This part is legal for sale or use on Racing Use Only Vehicles that are used exclusively for competition that are not registered and that may also never be used on the street.
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, as well as intake manifolds and much more. From start to finish, Holley has the parts to make your dream a reality!











