Holley EFI 300-923 Plenum Lid, Ford Coyote Ultra Lo-ram

#425300923

Holley EFI 300-923 Plenum Lid, Ford Coyote Ultra Lo-ram

Allows a variety of throttle valves including large monoblade, 2015-20 GT350, 2007-14 GT500, 2019-23 GT500, GM LS 4 bolt, 2011-23 Ford Mustang GT (with optional adapter 717-18)
Refined port design with streamlined injector boss for reduced turbulence without loss of flow area
Two 1/8 NPT ports on all manifolds. Two 3/8 NPT ports on all manifolds, except 300-911 has one

$318.95

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Product Summary

EFI Fuel System Type, No Value Carburetor Flange Type

Allows a variety of throttle valves including large monoblade, 2015-20 GT350, 2007-14 GT500, 2019-23 GT500, GM LS 4 bolt, 2011-23 Ford Mustang GT (with optional adapter 717-18)
Refined port design with streamlined injector boss for reduced turbulence without loss of flow area
Two 1/8 NPT ports on all manifolds. Two 3/8 NPT ports on all manifolds, except 300-911 has one
Fuel rails with -8AN ports and dual 1/8 NPT accessory ports for gauges or Gen 3 direct injection fuel line hookup
300-911 and 300-912 Ultra Lo-Ram will fit under stock hood with stock engine mounts in 2015-23 Mustang

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Key Specs

MFG. Part #	300-923
Brand	Holley
Material Type	Aluminum

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Holley 300-923 Details

The aggressively designed Hi-Ram is constructed in a two-piece design to accommodate for air to water intercoolers and feature up to 20% more plenum volume versus Ultra Lo Rams. This manifold design is only offered in an oval throttle body configuration.
The Ultra Lo-Ram provides an additional 19.4mm front and 42.6mm rear clearance compared to the Ford Performance Cobra Jet manifold, plus clears 2015-2023 Mustang factory hoods. Offered in both round and oval throttle body configurations, with replacement front inlets for easy interchangeability. The oval inlet can accommodate up to a 150x66mm single throttle body and 93mm on the round variant. Round inlets include standard mounting provisions for GT350, GT500, and LS 4-bolt throttle bodies. 2011-2023 GT throttle bodies can be used with the optional 717-18 adaptor.
Finally, an affordable Coyote intake manifold that also performs! The Hi-Ram and Ultra Lo-Ram are designed to fit stock bolt pattern OE heads found on the 2011-2023 Ford 5.0 Coyotes and related engine families, such as, Voodoo and Predators. These kits include fuel rails for use with OEM type fuel injectors and clips, mounting hardware, and O-ring gaskets. Offered in black and natural as-cast finish, both manifolds have a 9.20-inch runner length and are designed to improve the mid to high RPM powerband.
Features:
Allows a variety of throttle valves including large monoblade, 2015-20 GT350, 2007-14 GT500, 2019-23 GT500, GM LS 4 bolt, 2011-23 Ford Mustang GT (with optional adapter 717-18)
Refined port design with streamlined injector boss for reduced turbulence without loss of flow area
Two 1/8 NPT ports on all manifolds. Two 3/8 NPT ports on all manifolds, except 300-911 has one
Fuel rails with -8AN ports and dual 1/8 NPT accessory ports for gauges or Gen 3 direct injection fuel line hookup
300-911 and 300-912 Ultra Lo-Ram will fit under stock hood with stock engine mounts in 2015-23 Mustang
300-911 and 300-912 front inlets can be interchanged between round and oval with service parts
Modular design: accessible runner entries for porting, allows accessories like intercoolers and nitrous plates
Plenum Volumes: 300-910 9.8-liters, 300-911 8.4-liters, 300-912 8.2-liters
As-cast aluminum construction: more durable for boosted applications, can be welded for modifications

Specs

Basic Operating RPM Range: N/A
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: N/A
Deck Height: N/A
EGR Port: No
Emission Code: 3
Engine: Ford Coyote
Flange Style: N/A
Fuel Injectors Included: No
Fuel Rail(s) Included: No
Gasket Or Seal Included: No
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 Top
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: No
Throttle Body Included: No
Vacuum Ports: No
Warning: California Proposition 65

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. ++any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering there are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

WARNING:

Cancer and Reproductive Harm – www.P65Warnings.ca.gov

CARB warning

Holley 300-923 Specifications

KEY SPECS
MFG. Part #	300-923
Brand	Holley
Material Type	Aluminum

GENERAL
Fuel System Type	EFI
Color	Natural
EGR	No
Plenum Finish	Natural
Throttle Body Included	No
Injectors Included	No
Fuel Rails Included	No
Sold in Quantity	Each

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Fitment

2011-2014 Ford F-150

Ford Coyote Gen 1

2011-2014 Ford Mustang

Ford Coyote Gen 1

2015 Ford Mustang

Ford Coyote Gen 2

2018-2022 Ford Mustang

Ford Coyote Gen 4
Ford Predator
Ford Voodoo