Intake Manifold
Cross-Country
Joined: Jul 2010
Posts: 50
Likes: 0
Got one from local wrecking yard for $100 (no cracks and some tiny warpage). Took it down to the machine shop and they are gonna bolt the new Dorman exhaust manifold to it and plane 'em flat. Gonna order that Remflex 3005 gasket as it's a flat one-piece... at the machinist's advise. Things are looking up
Senior User
Joined: Jul 2019
Posts: 120
Likes: 4
From: Bentonville
I used a Offenhauser dual port manifold on my 300 I6.
The dual port manifold has a unique set up that helps maintain drivability and torque on your engine.
The carburetor primaries flow in separate smaller runners from the secondaries.
The small primary runners keep the velocity of the air/fuel charge high and maintain your street driving manners.
When you step on it, the secondaries open and flow through their own set of larger runners. They are located on the top of the manifold where they see less engine heat and have a denser charge.
https://www.summitracing.com/parts/ofy-6019dp/overview/
The dual port manifold has a unique set up that helps maintain drivability and torque on your engine.
The carburetor primaries flow in separate smaller runners from the secondaries.
The small primary runners keep the velocity of the air/fuel charge high and maintain your street driving manners.
When you step on it, the secondaries open and flow through their own set of larger runners. They are located on the top of the manifold where they see less engine heat and have a denser charge.
https://www.summitracing.com/parts/ofy-6019dp/overview/
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New User
Joined: May 2022
Posts: 1
Likes: 0
I’m looking at putting the single kit on a 61 f600. What did you do about brake booster line?
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Logistics Pro
Joined: May 2015
Posts: 4,463
Likes: 954
From: Tri Cities, TN
The person you're asking the question to hasn't been on here for almost a year, maybe he will respond, if not start a new thread. Somebody will know the answer.
Maybe try the I6 forum. Ford Inline Six, 200, 250, 4.9L / 300 - Ford Truck Enthusiasts Forums (ford-trucks.com)
Lead Driver
Joined: Jun 2006
Posts: 5,641
Likes: 965
From: Near Yosemite CA
I used a Offenhauser dual port manifold on my 300 I6.
The dual port manifold has a unique set up that helps maintain drivability and torque on your engine.
The carburetor primaries flow in separate smaller runners from the secondaries.
The small primary runners keep the velocity of the air/fuel charge high and maintain your street driving manners.
When you step on it, the secondaries open and flow through their own set of larger runners. They are located on the top of the manifold where they see less engine heat and have a denser charge.
https://www.summitracing.com/parts/ofy-6019dp/overview/
The dual port manifold has a unique set up that helps maintain drivability and torque on your engine.
The carburetor primaries flow in separate smaller runners from the secondaries.
The small primary runners keep the velocity of the air/fuel charge high and maintain your street driving manners.
When you step on it, the secondaries open and flow through their own set of larger runners. They are located on the top of the manifold where they see less engine heat and have a denser charge.
https://www.summitracing.com/parts/ofy-6019dp/overview/
Fleet Mechanic
Joined: Jun 2019
Posts: 1,898
Likes: 234
From: Southern California
Got one from local wrecking yard for $100 (no cracks and some tiny warpage). Took it down to the machine shop and they are gonna bolt the new Dorman exhaust manifold to it and plane 'em flat. Gonna order that Remflex 3005 gasket as it's a flat one-piece... at the machinist's advise. Things are looking up
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