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Offenhauser 6019DP Ford 240-300 I6 Cylinder Dual Port Manifold

Name: Offenhauser 6019DP Ford 240-300 I6 Cylinder Dual Port Manifold
SKU: 6019DP
Availability: BackOrder

Original price was: $762.00.Current price is: $652.00.

Ford 240-300 6 Cyl Dual Port Manifold for 390-500 CFM 4 barrel carbs.

Intake Manifold, Dual Port, Aluminum, Natural, Square Bore, Ford, 240/300, I6
Approx overall dimensions: 26″ L x 9″ D x 4″ H
Openings in rear of manifold are 3/8″ & 1/4″ NPT

PLEASE NOTE THERE IS A BACKORDER FOR THIS SKU. CURRENT ETA FOR SHIPMENT ON ACTIVE ORDERS WILL BE OCTOBER 2025.

Available on backorder

SKU: 6019DP Categories: Dual Port, Ford, Ford 300, Intake Manifolds Tags: 6019dp, dual port manifold, Ford, Ford 240/300, Ford 300, I6, L6, Offenhauser, straight 6

Description
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Description

PLEASE NOTE THERE IS A BACKORDER FOR THIS SKU. CURRENT ETA FOR SHIPMENT ON ACTIVE ORDERS WILL BE OCTOBER 2025.

Ford 240-300 6 Cylinder Dual Port Manifold. Through 1981. The Dual Port and “C” Series accept the Carter or Holley STD bore 4bbl carb. Carb size recommended for DP is from 390 CFM to 500 CFM; for “C” Series 500 CFM and larger. Use Holley No 8007 (390 CFM), Carter No 9400, or Carter No 9500 on Dual Port – Remove kick-down arm for linkage clearance. Carbs clear “C” Series manifold without mod. Offy universal linkage accessory kit is recommended in most installations. These manifolds on a stock 240-300 C.I. engine can increase HP output by 50 HP! Dyno tests on a Ford six with Dual Port manifold, headers and cam produced as much as 115 HP over the stocker!

FOR HEADS AFTER 1981:

The 6227 and 6019 intake manifolds for the Ford 300 (and 240) six-cylinder engines are often listed in brochures and catalogs as fitting “through 1981.” However, this fitment info is somewhat conservative due to changes in Ford cylinder heads and accessory mounting over the years.

In practice, both the 6227 (C-series) and 6019 (Dual Port) manifolds will fit Ford 300 inline-six engines and cylinder heads much later than 1981. The “up to 1981” notation primarily refers to accessory locations and minor changes in the cylinder head’s water passages or flange heights, not to the manifold’s ability to physically bolt up. These manifolds can be used on 1986 and even later engines with no fitment problems, as the essential head-to-manifold interface remains compatible through at least 1989, and often beyond that.

You may need to address minor details, such as water passage plugs or linkage options, when installing on later heads or with automatic transmissions, but the manifolds themselves will physically mount to cylinder heads well after 1981. If you’re working on a head newer than the late ’80s and want to be absolutely sure, a quick check of bolt locations and water passage alignment is advised, but in almost every case through the early 1990s, these manifolds will fit without modification.

the following information is important when choosing headers compatible with the 6227 manifold:

The 6227 manifold is generally designed to work with the stock exhaust, but many customers choose to run headers for performance upgrades on the Ford 300.
Clifford headers are specifically designed to only work with Clifford intake manifolds and are NOT recommended for use with the Offenhauser 6227 manifold due to fitment issues; modifications would likely be required and may not be worth the effort.
Brands like Hooker and Hedman (commonly called Headman/Headman) have made (or do make) headers that are compatible with the Ford 300 engine and are the most common brands used with the 6227 manifold. For best results, it’s recommended to use Hedman headers, as they are widely reported to fit well without major issues.
Cyclone and Pacesetter headers have also been mentioned as options, though you should verify current availability and fitment for your specific chassis and model year.
Borla headers do NOT fit with Offenhauser manifolds due to clearance issues. Modifications may also be required for some other brands.
When using headers with the Offenhauser 6227 manifold, it is important to use the correct header installation kit, especially on 1981 and newer engines. These kits include spacers and clamps to accommodate the differences in flange thickness between the intake and header/exhaust.