Air and Fuel Intake Manifolds and Components

Holley

Hi-Ram EFI Intake Manifold

$1,258.95

SKU: HY300242

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Holley 300-242 Hi-Ram EFI Intake Manifold is a cast aluminum intake designed for Ford 351W engines with a 9.5-inch deck height. It features a 105mm throttle body flange and is suitable for a wide range of engine combinations, operating effectively between 1500-7000 RPM. The manifold includes EFI fuel rails machined for -8AN O-ring fittings and is designed with a redesigned water crossover passage to allow for distributor phasing. This intake is intended for Racing Use Only Vehicles and is not street legal.
Show original supplier description
The Holley 300-242 Hi-Ram EFI Intake Manifold is engineered for Ford 351W engines with a 9.5-inch deck height, featuring a 105mm LS throttle body flange. This cast aluminum manifold boasts a runner length and tapered cross-section design optimized for performance across a broad spectrum of engine configurations, with a power band from 1500 to 7000 RPM. The aggressive styling is geared towards applications like drag racing, muscle cars, marine, off-road, and street-rod use. The manifold includes EFI fuel rails, precisely machined for -8AN O-ring fittings, capable of handling high fuel flows and dampening pulsations within the fuel system. A key design feature is the redesigned water crossover passage, which accommodates distributor phasing. This intake manifold requires the use of the Holley EFI Dual Sync Distributor (part # 565-111) for proper operation. It is constructed from cast aluminum and finished in satin. The manifold dimensions include a width of 11.32 inches and port sizes of 2.00 x 1.190 inches. It is important to note that this part is designated for Racing Use Only Vehicles and is explicitly stated as being against the law to install on an Emissions Controlled Vehicle, aligning with California Proposition 65 warnings.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberHY300242
CategoryAir and Fuel

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy