Holley 300-276 Small Block Ford EFI Intake Manifold, Square Bore, Single Plane, Rectangle Port, w/ Fuel Rails, Aluminum, Natural, Kit

The new single plane intake manifolds are designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The EFI manifold is designed to work with 4150 Style Throttle body EFI systems like the Holley 4150 style flange Universal Throttle Bodies. These intake manifolds are designed to accept most stock hardware and accessory brackets, but offer performance features like better plenum and runner geometry for improved charge airflow. The isolated design of the air/fuel passages helps to increase charge air density and performance.

The 300-276 EFI manifold includes black anodized fuel rails and rail bracket assortment for an easy installation with the injectors that you choose to use for your combination. The intake manifolds are designed for use with 289-347 cubic inch Small Block Ford engines 8.2" deck height.

Features:

• Single plane design with isolated plenum for cooler charge air temperatures
• 4150 square bore mounting flange
• Power band: 2500-7500 RPM
• Height: front 5.58”, rear 6.40”
• Port size: 1.82” height, 1.04” width
• Extra material allows for porting to 2.00” height, 1.20” width
• Anodized aluminum fuel rails with laser-etched logo (EFI model) 6AN
• Includes fuel rail mounting brackets in two sizes for more options in fuel injectors (EFI Model)
• Accessory ports under the carburetor in 1/8 NPT, 1/4 NPT and 3/8 NPT sizes

Instructions

Instructions - 199r12050.pdf

Emissions Warning
Products sold on this website may not be legal for use on public roads or highways due to Environmental Protection Agency (EPA) restrictions or California Air Resources Board (CARB) emissions regulations. Federal and State regulations may restrict Product installation to pre-emissions regulation (Model Year 1974 or earlier) or to competition/racing vehicles used exclusively in
1) events organized by recognized bodies, authorizing permits for participating drivers.
2) racing event qualification, and3) practice associated with events.
Installation of such products, including driving racing vehicles to and from the track, may be considered illegal “tampering ” or as “defeat device”, and may result in federal and state penalties. It is the purchaser’s responsibility to ensure compliance with all applicable emissions laws, including California’s stricter standards.

Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.