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post #1 of 71 (permalink) Old 08-09-2019, 12:20 PM Thread Starter
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Best Brand Aftermarket Intake Manifold

What do you guys think is the best after market intake manifold for my 97? I put a Dorman on my other 97 and was never impressed with the smaller ports. What one should I get? Thanks!

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post #2 of 71 (permalink) Old 08-09-2019, 12:50 PM
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Another Ford unit.

The Dorman units are junk. Get a replacement unit from the junk yard out if you can't afford new. Get it from a 98 - 04 Mustang or an '02+ Panther (Crown Vic / Grand Marquis / Town Car). So long as it doesn't have any cracks anywhere, it will be good. An Intake manifold from one of these units ought to also have the upgraded aluminum coolant pass over.

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post #3 of 71 (permalink) Old 08-09-2019, 12:52 PM
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Originally Posted by CDsDontBurn View Post
Another Ford unit.

The Dorman units are junk. Get a replacement unit from the junk yard out if you can't afford new. Get it from a 98 - 04 Mustang or an '02+ Panther (Crown Vic / Grand Marquis / Town Car). So long as it doesn't have any cracks anywhere, it will be good. An Intake manifold from one of these units ought to also have the upgraded aluminum coolant pass over.
99-04. 98 was NPI.

The FRPP one for ~250 is the best overall replacement for most situations. It supports a nice wide powerband, is light, doesn't heat soak, and works well. The downside is they will start to crack and fail after 20 years... Not much of a downside really.

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post #4 of 71 (permalink) Old 08-09-2019, 01:03 PM
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99-04. 98 was NPI.
The more you know!
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post #5 of 71 (permalink) Old 08-09-2019, 01:19 PM Thread Starter
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Another Ford unit.

The Dorman units are junk. Get a replacement unit from the junk yard out if you can't afford new. Get it from a 98 - 04 Mustang or an '02+ Panther (Crown Vic / Grand Marquis / Town Car). So long as it doesn't have any cracks anywhere, it will be good. An Intake manifold from one of these units ought to also have the upgraded aluminum coolant pass over.
Been there, done that. That's exactly what got me in this problem. The one on it now is one of the junkyard original Ford manifolds. It cracked along the rear plastic water fitting. Thanks but I need a new one but not the high dollar Ford one which cracks anyway. That's why I asked about aftermarket.

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post #6 of 71 (permalink) Old 08-09-2019, 01:24 PM
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I that case, Trick flow.
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post #7 of 71 (permalink) Old 08-09-2019, 01:40 PM Thread Starter
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Originally Posted by Woodman View Post
99-04. 98 was NPI.

The FRPP one for ~250 is the best overall replacement for most situations. It supports a nice wide powerband, is light, doesn't heat soak, and works well. The downside is they will start to crack and fail after 20 years... Not much of a downside really.
Will the FRPP one work on a 1997 even though it is listed for a 1999-2004? Where can I find it for $250? That's a good price!

Phil Swanson

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post #8 of 71 (permalink) Old 08-09-2019, 03:01 PM
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I'd get one from a junkyard; you need the valley tube and some other stuff as well.

Look on Modular Headshop to see what's available.

https://www.modularheadshop.com/c-12...omponents.html

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
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post #9 of 71 (permalink) Old 08-09-2019, 03:39 PM Thread Starter
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I need to find a manifold for a non-PI engine . Stock 1997 configuration. Maybe I'm stuck with another Dorman. No junkyards! Those are guaranteed to crack from too many heat cycles and old age.

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post #10 of 71 (permalink) Old 08-09-2019, 04:34 PM
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Quote:
Originally Posted by 97Bluebird View Post
Will the FRPP one work on a 1997 even though it is listed for a 1999-2004? Where can I find it for $250? That's a good price!

Phil Swanson
Yes, that’s the common PI intake swap. You need a valley tube PI gaskets and need to dab two dots of RTV on the edge of the coolant ports on the head where the gaskets don’t quite align. In all other respects it’s a direct fit

-Matt
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post #11 of 71 (permalink) Old 08-09-2019, 04:37 PM
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Get the FRPP unit. It'll work on a NPI heads. You just need the coolant tube and some RTV Black on the two cross corners. There are several write ups and a few YouTube videos on how to make it work on NPI heads. I'm running an FRPP unit right now....

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post #12 of 71 (permalink) Old 08-09-2019, 04:49 PM
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Quote:
Originally Posted by 97Bluebird View Post
I need to find a manifold for a non-PI engine . Stock 1997 configuration. Maybe I'm stuck with another Dorman. No junkyards! Those are guaranteed to crack from too many heat cycles and old age.
Those are Disco; JY is the only source.


You can buy a new PI manifold here:

https://www.modularheadshop.com/i-24...tegory:1268182

For $279, drilled for the second sensor, that we need.

You will also need this:

https://www.modularheadshop.com/i-24...tegory:1268182



You can get these parts from a JY; Crown Vics and GM 4.6l cars to 2009 will have these; maybe later.

Getting the coolant 'nub' out is iffy, tho. Easier to buy new.


Read the sticky on how to do the swap; you will have to pull the water pump, so I'd upgrade it to the closed vane mustang unit at the same time.

If you pull it at the JY, you can grab the pulley as well, so you can use either type water pump.


There's a bunch of other stuff that has to be done just so; read up on it before you start.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
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post #13 of 71 (permalink) Old 08-09-2019, 05:33 PM Thread Starter
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I bought an ATP bolt on. Carried by Rock Auto so it's probably pretty good. Don't want to do allot of unnecessary mod work. This one is a bolt up. It's only a grocery getter.

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post #14 of 71 (permalink) Old 08-10-2019, 07:11 AM
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I have run the non-PI intake, PI intake, Typhoon and the street heat trick flow intakes on my cougar.

All of them work in the proper rpm range.

Get the intake manifold for the rpm range you intend to run.

Totally stock engine NPI or PI for a little more get up and go.

The Typhoon was slightly better than the PI.

Advantage of the Typhoon is all aluminum, fully portable and will never crack of break from too much boost.

Typhoon cost is not worth the performance gain unless you are supercharger or turbocharged.

TFS Street heat is a 7000 rpm manifold, not worth the cost unless you are running those rpm with heads, cams, valve springs and headers to match.

Fortunately, at the present time my junk works with this one.

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post #15 of 71 (permalink) Old 08-10-2019, 09:16 AM Thread Starter
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I am not looking for any kind of a performance gain. It's debatable whether a PI manifold would boost HP anyway when you are running NPI heads. I also don't like the idea of mismatched ports. Sure the PI head will breathe better until the airflow hits the head ports. Then they are funneled down to the NPI port in the head. Gain is probably close to zero.

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post #16 of 71 (permalink) Old 08-10-2019, 10:15 AM
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Quote:
Originally Posted by 97Bluebird View Post
I am not looking for any kind of a performance gain. It's debatable whether a PI manifold would boost HP anyway when you are running NPI heads. I also don't like the idea of mismatched ports. Sure the PI head will breathe better until the airflow hits the head ports. Then they are funneled down to the NPI port in the head. Gain is probably close to zero.
Uhh, that debate was settled 10+ years ago with numerous dyno evidence to prove it. NPI ports aren’t smaller than PI, they’re just shaped differently at the flange, the mismatch may offend your aesthetic senses but the actual effect on airflow is nil. It’s also been proven in fact that the horsepower gains from just the PI intake and PI cams on npi heads are about equal to a full PI engine swap

-Matt
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post #17 of 71 (permalink) Old 08-10-2019, 10:27 AM Thread Starter
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Uhh, that debate was settled 10+ years ago with numerous dyno evidence to prove it. NPI ports aren’t smaller than PI, they’re just shaped differently at the flange, the mismatch may offend your aesthetic senses but the actual effect on airflow is nil. It’s also been proven in fact that the horsepower gains from just the PI intake and PI cams on npi heads are about equal to a full PI engine swap
If I want a HP gain, I'll drive my Challenger. Bust knuckles for 10 HP at best. I don't think so.

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post #18 of 71 (permalink) Old 08-10-2019, 10:49 AM
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You’re going to be busting knuckles either way by the sound of things. You asked, we answered. The only option that fits your criteria gives you a small horsepower gain.
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post #19 of 71 (permalink) Old 08-10-2019, 11:18 AM
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If I want a HP gain, I'll drive my Challenger. Bust knuckles for 10 HP at best. I don't think so.
I think you'll find much more happiness on a Mopar forum.

We like to bust knuckles here.

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Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
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post #20 of 71 (permalink) Old 08-10-2019, 12:54 PM
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I think you'll find much more happiness on a Mopar forum.

We like to bust knuckles here.

Hey!

We like busting knuckles on the Mopar forum I'm on for my Dakota, too!

But not just for a minor horsepower increase, no; we're typically working on how to make parts that fit and work with our obsolete trucks.

RwP
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post #21 of 71 (permalink) Old 08-10-2019, 01:55 PM
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He already bought an ATP, which IIRC someone once said it was a Dorman.

While the Dorman does have ugly sharp edges inside, it does hold up quite well (knocks on wood). Years ago, I replaced a Ford replacement one on our old Cougar with one (before I knew better), and we put at least 80k miles on it before we sold the car. My current 97 has one that the PO had installed before I bought the car.

Sure, you can call a Dorman ugly, but you can also call the old Ford replacement manifold circa 2002 a POS because it only lasted like 40k miles.

Al
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post #22 of 71 (permalink) Old 08-10-2019, 02:24 PM Thread Starter
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You’re going to be busting knuckles either way by the sound of things. You asked, we answered. The only option that fits your criteria gives you a small horsepower gain.
Yes, I asked but asked for an aftermarket manifold. Never wanted to get another stock one or modify to a PI. I am running a Dorman on my other 97 T Bird but was not impressed with it's construction. It has been reliable though after at least 10 years of service.

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post #23 of 71 (permalink) Old 08-10-2019, 03:32 PM
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Yes, I asked but asked for an aftermarket manifold. Never wanted to get another stock one or modify to a PI. I am running a Dorman on my other 97 T Bird but was not impressed with it's construction. It has been reliable though after at least 10 years of service.
When asking for "Best Brand Aftermarket Intake", we delivered. The PI and FRPP units are technically aftermarket for the MN12 platform as they did not originally come with the car. The answer wasn't what you liked / wanted to hear.

A better thread title would have been, "What Aftermarket Intakes work" because that's what you were really looking for.

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post #24 of 71 (permalink) Old 08-10-2019, 03:54 PM
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...

Sure, you can call a Dorman ugly, but you can also call the old Ford replacement manifold circa 2002 a POS because it only lasted like 40k miles.

Al
The problem is that it drops at least 10-15 HP over stock.

It's been Dynoed here, if anyone cares to search.
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Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
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post #25 of 71 (permalink) Old 08-10-2019, 06:29 PM
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Every single aftermarket stock replacement manifold is the same thing. The dorman, ATP, SKP, and Ultra Power are all the same manifold made at the same Chinese factory with the same molds and the same level of quality control. You said in your first post that you were not impressed with the dorman unit. If that doesn’t work for you, then none of the others will be any better.
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post #26 of 71 (permalink) Old 08-10-2019, 07:59 PM
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The problem is that it drops at least 10-15 HP over stock.

It's been Dynoed here, if anyone cares to search.
The “PI” dorman (et al) drops power on a PI engine, it’s basically just a lower quality npi in terms of flow. On a npi it’s adequate af far as performance. I don’t like them regardless because the plastic is even less robust to heat cycles and age than the Ford unit and the integrated gaskets add failure points.

-Matt
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post #27 of 71 (permalink) Old 08-11-2019, 12:12 PM Thread Starter
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Thanks allot to everyone that responded. I have learned allot from you guys. I bought an aftermarket but will be looking for a Ford unit at the junkyard. From failures, I have noticed the weak point in the Ford unit is the water heater hose barb at the rear on the r/h side. They crack like crazy. Although the Dorman unit is not great for flow, Mine has never cracked at that connection. There is a great video on You Tube on how to convert from NPI to PI. Thanks again everyone.

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post #28 of 71 (permalink) Old 08-11-2019, 12:21 PM
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Yeah that’s the Achilles heel of the aluminum crossover intakes. If I still had a 2V I’d block off that port on the manifold somehow and use a 4V “crackpipe” on the back of the head instead.

-Matt
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post #29 of 71 (permalink) Old 08-12-2019, 08:00 AM
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Originally Posted by 97Bluebird View Post
. From failures, I have noticed the weak point in the Ford unit is the water heater hose barb at the rear on the r/h side. They crack like crazy. Although the Dorman unit is not great for flow, Mine has never cracked at that connection.
Because on the Dorman, the nipple and manifold are both plastic. On the Ford units, it is brass, and presumably expands at a different rate than the plastic, which eventually cracks the plastic.

Al

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post #30 of 71 (permalink) Old 08-12-2019, 10:10 AM Thread Starter
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Because on the Dorman, the nipple and manifold are both plastic. On the Ford units, it is brass, and presumably expands at a different rate than the plastic, which eventually cracks the plastic.

Al
Ys, that's exactly what happened to my Ford manifold in 30K miles! These are probably made in China now too. I think the Dorman is not as free flowing but does last longer.

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