Features:

• As-cast aluminum construction: more durable for boosted applications, can be welded for modifications
• Modular design: accessible runner entries for porting, allows accessories like intercoolers and nitrous plates
• 300-911 and 300-912 Ultra Lo-Ram will fit under stock hood with stock engine mounts in 2015-23 Mustang
• Refined port design with streamlined injector boss for reduced turbulence without loss of flow area
• 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)
• 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 front inlets can be interchanged between round and oval with service parts
• Plenum Volumes: 300-910 & 300-915 9.8-liters, 300-911 8.4-liters, 300-912 8.2-liters
• Two 1/8 NPT ports on all manifolds. Two 3/8 NPT ports on all manifolds, except 300-911 has one

About Holley

Holley Performance Brands is the undisputed leader in carburetors, fuel pumps, fuel injection, intake manifolds, fuel injection, and fuel systems.

The following vehicles are considered Racing Use Only Vehicles:

• Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle