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Old 10-30-2010, 03:36 PM   #1 (permalink)
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Hi-po exhaust manifold?

Are the factory hi-po exhaust manifolds from a 65/66 289 Mustang the same as the Hi-po 289 in a 64/65 Sprint?
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Old 10-30-2010, 06:42 PM   #2 (permalink)
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Re: Hi-po exhaust manifold?

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Are the factory hi-po exhaust manifolds from a 65/66 289 Mustang the same as the Hi-po 289 in a 64/65 Sprint?
No! Mustang Hi-po's will not fit in early falcons up through 65. You need the Falcon version Hi-po's, which are no longer made. Even then they can be a tight fit on some and not others.

R
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Old 10-31-2010, 02:34 PM   #3 (permalink)
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Re: Hi-po exhaust manifold?

thanks for the info.....saved me some money....
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Old 11-01-2010, 02:26 PM   #4 (permalink)
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Red face Re: Hi-po exhaust manifold?

HAY 1966ER
i have a set of hipo k manifolds that i have modified to fit my 1963 falcon if you are interested in them for $500 let me know. comes with a head pipe and will fit fully ported aftermarket heads that still use 2" factory mounting pattern. these have been built up using cast iron weld not brass. 818 679-9601
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Old 11-01-2010, 05:26 PM   #5 (permalink)
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Re: Hi-po exhaust manifold?

I used 70s Maverick manifolds that look the same as Hipos and fit perfectly in my 65 Comet. Found them on Ebay for $40.
Joe
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Old 11-02-2010, 11:53 AM   #6 (permalink)
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Re: Hi-po exhaust manifold?

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I used 70s Maverick manifolds that look the same as Hipos and fit perfectly in my 65 Comet. Found them on Ebay for $40.
Joe
If 70 Maverick manifolds should be the same as 72 and later, then they do fit early falcon/comets. They were used on mavericks and granadas. They are not exactly the same as Hi-pos but are close. They are a good fit in a tight falcon/comet body.

R
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Hi-po exhaust manifold?-d1de9431amavgran.jpg  
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Old 11-03-2010, 09:50 AM   #7 (permalink)
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Re: Hi-po exhaust manifold?

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Originally Posted by Comechero65 View Post
If 70 Maverick manifolds should be the same as 72 and later, then they do fit early falcon/comets. They were used on mavericks and granadas. They are not exactly the same as Hi-pos but are close. They are a good fit in a tight falcon/comet body.

R
I agree; the driver side is large and looks like it flows decent, but the right side is almost the same as the stock 65 manifold, maybe a bit larger. The crucial dimension is the width and these are very slender in the middle to clear the shock towers. I had to grind down some of the ribs to get an extra few thousandths from both sides.
I looked up and down for the repro Falcon Hipos and theyre just not out there, I think Maverick manifolds are a good compromise. Unless your making big power then headers might be a better option.
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Old 11-03-2010, 11:19 AM   #8 (permalink)
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Re: Hi-po exhaust manifold?

joemd,
If you are using pass side maniflod like in the next pic it is similar to what was used on 69 Mustangs. Similar to stock early manifolds except the end turns down and has a slightly larger outlet port which matches the drivers side mav/ganada. They flow better than stock.

Grinding down the ribs should help with the clearance without harming strength.

The second and third are simlar in design just different years. Third is from a truck. Reference the numbers for year and model.

If you still want a falcon version hi-po manifold just keep looking. They turn up every so often.

R
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Hi-po exhaust manifold?-c9oe9430b.jpg   Hi-po exhaust manifold?-d9ae9431ea.jpg   Hi-po exhaust manifold?-e5te9431ba.jpg  

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Old 11-05-2010, 01:41 PM   #9 (permalink)
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Re: Hi-po exhaust manifold?

The pair Im using are just like these:
Ford Maverick Exhaust Manifolds

They fit nicely and it allows for a true dual exhaust, unlike the factory 64/65 setup.
Joe
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Old 11-05-2010, 11:47 PM   #10 (permalink)
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Re: Hi-po exhaust manifold?

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The pair Im using are just like these:
Ford Maverick Exhaust Manifolds

They fit nicely and it allows for a true dual exhaust, unlike the factory 64/65 setup.
Joe
Your drivers side manifold is the same as the one I posted. The pass side is like the standard pass side on many fords especially mustangs. The one in the left of the 3 pics is similar except the end turns down. It also has a slightly larger port similar to the other side or a Hi-po manifold. Probably flows just slightly better. But since you have it installed and working probably isn't worth the trouble to change for only a slight gain. Your setup should work just fine.

R
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Old 11-07-2010, 06:57 AM   #11 (permalink)
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Re: Hi-po exhaust manifold?

Great info guys.....I know where there is a 73 V8 Mav for parts........Let me see if the manifolds are still there......
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Old 11-07-2010, 06:56 PM   #12 (permalink)
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Re: Hi-po exhaust manifold?

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Great info guys.....I know where there is a 73 V8 Mav for parts........Let me see if the manifolds are still there......
Good luck, the pair in the CL ad above dont look too bad either.
Joe
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Old 11-07-2010, 07:05 PM   #13 (permalink)
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Re: Hi-po exhaust manifold?

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Originally Posted by Comechero65 View Post
joemd,
If you still want a falcon version hi-po manifold just keep looking. They turn up every so often. R
Thanks for the info. It seems like when I really started looking fo those manifolds they were not being made anymore and the people that had them were keeping them. I think I did find a used pair for $500 that I passed on

If I find a good pair at a decent price I will buy them...but for now the Mav-ifolds are OK. I really wasnt looking for a big performance gain, just a dual exhaust without going to headers.

BTW I saw a NOS 65 Falcon factory dual exhaust kit once. I cant exactly recall, but I think it was a crazy looking U-shaped inlet pipe for the driver side, and a standard inlet pipe for the pass. side.

Joe
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Old 11-10-2010, 08:30 PM   #14 (permalink)
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Re: Hi-po exhaust manifold?

i have a pair of falcon HI-POs in my '65 ranchero on a 302 aluminum head roller motor. they're really heavy. and hard to fit if you have the stock steering box. and if they do clear the box there's only about an 1/8" of clearance between the manifolds and the shock towers. i had to use ron morris motor mounts to get them to work at all. i would have swapped them out for headers but i can't find anything to fit.
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Old 11-19-2010, 10:49 AM   #15 (permalink)
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Re: Hi-po exhaust manifold?

FYI there were NO HI PO 289s factory producted in ANY 60 to 65 Falcon, Comet yes but NO proof that they had a special manifold set.
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