High flow manifolds (no headers no)
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Junior User
Joined: Nov 2004
Posts: 62
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High flow manifolds (no headers no)
Hello all, I have a 1971 F100 360 manual (4 speed with granny) sport custom.
Just wanted to know if there are any high flow exhaust manifolds that would fit this engine. I don't want to do headers (will not,will not do them) and just wanted something to let the engine breathe a little better.
Is there a manifold that I can scavenge off a later engine that would work better than my stock exhaust manifold?
Just wanted to know if there are any high flow exhaust manifolds that would fit this engine. I don't want to do headers (will not,will not do them) and just wanted something to let the engine breathe a little better.
Is there a manifold that I can scavenge off a later engine that would work better than my stock exhaust manifold?
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
iron logs
The 75 truck exhaust manifolds, they have ribs on the outside are bigger than the 2 x 4 logs and flow better. I had a set on the 68 that I gave away and installed headers. Ran headers 18 years on the last motor without replacing any part. Why you against headers, they work better than those iron logs?
Carl....=o&o>....
Carl....=o&o>....
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Junior User
Joined: Nov 2004
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Thanks for the information. It stands to reason that the later 360s had better exhaust manifolds. I think I'll try looking at the bone yard and seeing what they have. When do you think was the last year for the 360/390 that would have usable manifolds for my 71?
I'm against headers for the all too common reasons : 1)hard to put in and a pain to take off if they don't fit right, 2) I had a set that i had to remove everytime I wanted to change the starter 3)they get too hot and burn up the starter 4) they take up a lot of space 5)they just always looked "cheap" to me etc etc
I do agree with you that they help with gas mileage and look cool, sound cooler.
I think the biggest issue is having to take them off all the time for unexpected reasons....
I'm against headers for the all too common reasons : 1)hard to put in and a pain to take off if they don't fit right, 2) I had a set that i had to remove everytime I wanted to change the starter 3)they get too hot and burn up the starter 4) they take up a lot of space 5)they just always looked "cheap" to me etc etc
I do agree with you that they help with gas mileage and look cool, sound cooler.
I think the biggest issue is having to take them off all the time for unexpected reasons....
Lead Driver
Joined: Oct 2004
Posts: 8,062
Likes: 35
From: Central Oregon
For good flow cast manifolds try looking for a set of 406/427 stock cast manifolds. I have seen them in the Dearborn Classics cadalog, run about $650 new. Or look at the swap meets for some used ones.
