Some interesting comparisons BUTTTT .....

How about some popular mods on those exh mans LIKE ....

A quickie port job with a tootsie roll .....

Maybe adding a carbide burr ......

THEN a typical extrude hone ......

T H E N an extrude job like the FAST guys get ?

And those headers ? Are those 99$ ones or 6 hun ?

I've seen a lot of misinformation in more than one magazine article

Given the type of street driving that most of us do, you aren't going to see a big difference between manifolds and headers. For those who are chasing the speed demon, headers are a no-brainer. I'm not 19 anymore and running stoplight to stoplight with my right foot into the water pump. Manifolds are fine for me.

I’m 62, headers are fine for me. Oh, and probably about a 30 pound weight savings too!

62 ? ... damn... I should respect my elders ...

Ur a seasoned citizen... gEeZeR

Wow! Now I see why people don't want to put anything on Moparts anymore. There are just some people that want to over analyze everything they can and claim it's possibly fraudulent. Sorry I shared this with Moparts, I thought it was a good learning point. From now on I'll just keep things to myself and the righteous ones on here can go back to Facebook and play with the liberal weenies there.

Not fraudulent, incomplete. And my manifolds identify as headers so all good here.

Too bad you didn't take advantage of learning from the commentary here. Like most articles the info you posted isn't the complete story.

Cripes, has the World gone NUTS!

Everyone knows that Gods County is Kent, England UK so someone is making fraudulent claims lol...

All I know is ''if you can't trust Nick'' then the world has become a VERY, VERY SAD place...

He did the same test with 'HEMI' Headers and CAST manifolds..

He also did 'HEMI' IRON heads against ALUMINUM...

Some of you folks need to get out more and smell the daffodils...

Every time you take a 'brick outta the wall of life' it gets more and more SHAKY and will one day 'FALL-DOWN'...

I'M NOT FEELING YOUR 'MOPAR LOVE' ANYMORE...

Was a good video...motor belonged to a customer that Nick was prepping for running in his car...he didn’t build it and had no idea of the internals...I wasn’t totally shocked on the weight difference between the HP and Maxie manifolds...but they sure did work...wish he’d of weighed the headers too, but of course they’d be the lightest. Did not think there would be such a huge gap on the HP and MW though...

I don't understand the perceived negativity. The video shows a lot of data, and there are a quite a few good learning points in the comments here. Nobody is attacking Nick personally, he made it clear in the video that he knew nothing about the engine internals. There will be people telling everybody to "trash the manifolds, headers are a +44 hp mod, just watch the video!"

As always, reality is a bit more complex... if you are building a new engine that you want to optimize, you have to make a decision whether it's going to be a manifold or header engine, then build accordingly.

Thanks for posting Godscountry340. I got something out of it. I sure am glad I didn't start this post.

Oh, I'm learning a lot from the commentary here. Your post just affirms my last post.

Why are you offended by the responses?

Would you have preferred to have the original post just sit there with no responses? The test results are controversial. And details matter. Both were discussed and really sorted out rather well. Something that the original post did not do. Some of the responses could have been more nuanced and more diplomatic, but this is a forum populated by car guys. Not politicians.

IMHO, overall an interesting topic with interesting responses.

I guess the comment that the test can be "rigged" to get result left the impression of calling the video a fraud.

So the learning point is headers may give large improvement depending on the combination, but also just a marginal improvement with different combo. The whole point of say I can make a dyno test do what ever I want, while true is not relevant to this post unless your accusing the video of doing just that.
I imagine most folks know that if your testing you need to keep all the variables you can constant. They probably also know just because one combo works really better with headers, that a whole different combo may not work as well with headers.

Yes you most certainly did miss it all. He tested three different manifolds on the same engine, he WASN'T TESTING THE ENGINE! You’re calling him a liar and a cheat, he ‘rigged’ the test. Very childish. Why don’t you do the identical test, exactly the same, but first you’ll have to find out all about that engine, do a video then get back to us. Until you PROVE him wrong, you’re wrong.

Yes the results were shocking on many levels indeed.

I am gonna run a 71 high-comp six pack 440, in my 71 GTX with stock hipo manifolds.
If it’s gonna kill 40 horses and 50 lbs of torque, it’s a complete nonsense.
Looking to make around 450+ hp at the flywheel/ convertor.
If it gets knocked back to factory 375 horses, that sucks...

Now Nick did say it was low cylinder pressure engine, so probably later low comp pistons?
So the headers as every one knows are lighter and MOST efficient.

Don’t think a set of 62/64 max wedge manifolds will look good in a 71 GTX Superstock lol.

Ps. Methinks using certain words in a thread, that may suggest a fiddle has occurred can ‘agitate’ certain Nick followers...
Pps I’m sure that any misunderstandings with good Mopar folks said in JEST can be overlooked...

I just hope Nick doesn’t read his fan mail on Moparts...

This thread has all the Hallmarks of a Sherlock Holmes mystery?

What’s was Nick’s intention in rigging the header results?

We have to go back to basics, motive- means- method...

If he did ‘rig the rig’ how did he do it?
Was the video continuous for the full 45 minutes?

If not, what did he do to the engine during header changes?
How did he remove 45 hp and 50 lbs of torque?

Simplest way would be to have two different engines, one Hipo, one Lopo...
The headers and max wedge pulls were done with the hipo engine, then
Swap engines and do the stock hp manifolds on the Lopo...

But here’s where it all falls down!
MOTIVE, why would he want to destroy the reputation of HP MANIFOLDS...

Is it a long held grudge going back to his childhood days of match- racing...
He said he could out run his friends 440 car ( hp manifolds) with his 318 Poly car ( with headers)
Unfortunately, Nick lost badly and wanted his revenge after 40 years...


Or has Nick secured a contract with Hooker and the makers of MAX WEDGE MANIFOLDS...

i put aside comments and try to learn [or remember what i have forgotten ] from all posts, regardless of the controversy.
to the OP, don't pay attention to the naysayers. the only way to get an answer to a question is to ask it.
i'm not a super-genius, so i ask away. especially when i can't remember..............[now where are my glasses........]

I've seen results of using headers with a 2.5 inch exhaust system with a set of the old Thrush Corvair turbo muffs making three runs back to back and then with no other changes removing the exhaust system from the headers back, about five feet long with side exit pipes in front of the rear tires and around 15 lbs. weight per side.
With exhaust and new 10x285x15 slicks inflated to 12.0 lbs. it ran 12.31 at 109.?? MPH (this test was done back in 1993 in November on a Friday night at LACR with a D.A of around 3300 FT) at 5:30 PM, 2nd run was with 11.0 lbs. and it ran 12.27 ET at 109.?? MPH at 7:30 PM with almost the same D.A. a little colder and more humidity 3rd run was at 9:30 PM with 10.0 lbs.in the slicks and it ran 12:23 at 109.?? MPH. LACR had a 10:00 PM curfew so the next runs where done the next morning starting at 10:30 AM with almost exactly the same D.A. with less humidity and a little more air temps. with similar barometer readings. I remove the pipes and muffs and it ran 11.39 at 117.6? MPH with 10.0 lbs. pressure The next run was in the left lane as I was going to run it in the bracket race that day, (I had made all three runs Friday night in the right lane to test the tire pressures) I couldn't really believe that the car had ran the much faster and quicker when I got the time slip, I didn't feel it being that much quicker and faster during that run Same tire pressure with no changes other than running in the left lane, LACR had right at .003 quicker n the right lane compared to the left lane back then, it was 11:30 AM and maybe 80 ft. higher D.A. and it ran 11:42 at 117.6? MPH I made one more TT and it ran 11.39 again in the right lane a t 117.6? MPH before starting racing. I made it to round 3 before breaking out in the left lane by running 11:42 on a 11:45 dial on the brakes at 3:30 PM
I decide to put on a set of race bullet muffs that were 14x3.5 around twenty inches long hooked up directly to the 3.5 Hooker header collectors and it ran 11:52 at 116.?? MPH 40 minutes later, I thought it would run quicker and faster with them acting like collector extensions, it didn't
Theory is one thing and actual results are the truth
I had a complete 3.0 inch exhaust system on my old pump gas Duster exiting at the rear bumper with a set of the older crimp style Magna flows 14x7x3.0 side inlet and with center outlet with a 3.0 inch perforated pipe connecting both ends mounted behind the rear end with the same Hooker fender well 1 7/8 with 3.5 inch collectors headers as was on my old 440 1969 Dart, I tested that system at the local 1/8 mile track at Madras several years back and saw only .030 ET with .2 MPH differences. 7.01 ET with 95.25 MPH with the system on and it ran 6.98 ET at 95.45 MPH, not worth removing it
I'm sure the weight loss (around 45 Lbs. total) was the real reason it ran that much different