Breathing out is just as important as breathing in, for an engine...

Too many pens in his pocket. Thats crazy

Love pats dyno face, same thing happens to me when I drop the hammer & bang gears!

This is exactly the reason I watch Power Nation for the dyno moments and all in between.

They not only make a difference, the size and length of the primaries along with the collector makes a difference.

The show engine Masters does a great video on this topic. It Covers 5 different sets of headers on the same test engine across the entire power band.

The man is determined, Pat that is, the expression said it all.

I'd love to see a comparison under load with part throttle driving. 2 inch creates headder packaging problems under the hood.

We must put headers on EVERYTHING!!

I’d say yes. My factory log manifold choked my 408W heavily everywhere. I made power everywhere and lower engine temperatures on hot days.

When it comes to custom headers bigger the better, besides improved performance it makes the engine sound awesome

Just like a military officer with medals and pins on their chest, Pat has a pen in his front pocket holder for every incredible engine achievement he has done.

Love me some Windsor.

Wait I think he's missing a number two pencil in his pocket..lol

You need to do stock engines with oem intake and exhaust, and try different AM intakes, headers, exhaust, tuning, etc. Also, LTHers before and after ceramic coating.tttttttttttttt

The real key here is “THE PURPOSE OF THE MOTOR” These HP gains were made at MAX RPM I am not racing my engine but doing street and daily driving…needing drivability and low end torque There fore if I wanted headers it would be for looks = small tube long length

As a professional mechanic I always put high temp RTV on my headers LOL

I'm going to be using Hedman long tube 460 Ford motorhome headers on my Atk 520 based rock crawler engine thanks to your videos.

A motor is literally a giant air pump the more you can get in and burn and the better you can get it out will make more power

The answer is still “it depends”. Lower displacement and power levels a bigger header won’t do much.

What impressed me is that the torque peak for the 2" race header was still around 4800 instead of higher in the band.

I love the dyno face !!

Project Suggestion with Power Nation associates: Build 70-72 Buick GS, Skylark or Skylark Custom as a "BASE" Buick GS. Premise: in 1974 only, Buick produced a 2BBL 455. If available, dyno as is then bring up to almost '70 spec with the 2 barrel then dyno again. Base GS: manual brakes, front aluminum finned brake drums, manual steering, NO a/c, base factory steering wheel, floor mounted Hurst shifter, HD 3 speed manual transmission, HD clutch, bench seat, stock dashboard, hood-mounted tach or steering column mounted tach, 15" steel wheels with Buick dog dish hubcaps, tires equivalent to G or H60-15s, HD shocks, HD coil springs, HD front and rear sway bars, 3:08 or 3:23 posi-traction differential, Buick AM radio, stock heads, stock exhaust manifolds, stock 2 barrel intake manifold (internally polished) and any other "Base" factory stock components I might have forgotten. In 1974, Buick Le Sabre could be ordered with the 2bbl 455.I hope this suggestion gives you inspiration to possibly build this project car. Thank You

How many things could you possibly need to have clipped in your shirt pocket!

I think Pat could really squeeze one more pen in that shirt pocket! 😄

Wow 7% increase in power awesome even for my audi 3.0 v6 it gives me an extra 23HP absolutely worth it

Swapped a LS1 into my grand marquis. I bought a super cheap set of long tubes just to see if I could get them to fit. I tried and tried and it wasn’t happening. Went with hooker manifolds and I’ve been happy with them. For 400ish hp it’s good enough and a reliable seal

His dyno face is Hilarious

Pat ain't playing with his pen game.....

Oh yes especially if compared to cast iron exhaust manifolds!

Looking for new headers on Summit now .

Headers help the motor breath an they help all the way around, get the heat out the motor faster no thinking involved.

If you did a video on small block Windsor engines every day, I would watch.

All the pens in his pocket should easily add 50 hp..and I've never once seen him use a pen

I wonder if rusty old headers will make more power than brand new shiny headers, since rust is a great insulator and will resist thermal transfer. Rusty exhaust is basically already wrapped.(in rust) Ratrods rejoice.

Pat never needs to look for a pen

It's the. Eye of the tiger it's the thrill of the fight... My man had laser eyes there for a minute.

This man's pocket is doing the work here

The way I understand it is that smaller horsepower engines like mild small blocks that aren't built to breath very well in the top end don't really benefit from large tube headers like 2.5 inch or bigger and will lose some low end grunt where the engine is designed to live and also smaller tubed headers like 2 inch or even 1 3/4 inch Tri-Y headers are a good choice for these type engines, on the other hand if you have a small block built for top end horsepower at the expense of low end torque then bigger, short tube headers like 2 1/2 or 3 inch can benefit in the upper RPM range allowing it to breathe better. If it breathes too much for how your engine is built then you don't have enough back pressure for good low end torque and on the other hand if you have small diameter longer tubed headers on an engine that's built for higher horsepower then you're restricting the exhaust too much and it can't breath when it needs to. It all depends on what the engine is built for. Also a crossover or X pipe put in at the right point, where the heat build-up is at it's highest point in a dual exhaust pipe setup, will also equalize the exhaust pressure and pulses which help scavenge the exhaust which helps with low end torque as well.

time to order them 2 inch

Unrestricted air in and unrestricted exhaust out will undoubtedly increase performance and efficiency.

Depends on how restricted the oem is. My 14 gt didn't gain anything from headers that I could tell. Aluminum driveshaft is money much better spent there. Immediately could tell my rpms came up quicker.

I added a header to my five cylinder Hummer h3. It adds 32 hp. Orion by Mesa Black works

Never seen someone use sealer on header's before

Once I cranked a Honda up with no exhaust manifold on it. It sounded like an airplane. Take the throttle body off and the exhaust and crank it up!!! It'll spin as fast as it can and it'll make all the power possible!!! For about 3min.

How about this same test on a 408 Cleveland with decent alloy heads. Windsor’s run out of breath way too soon.

The look on his face says his butt is puckered hoping it doesn’t scatter when he pulls the throttle lever.

I’ll volunteer my 1967 mustang fastback for you guys to put that engine into it

My car was good for over 50whp when I went to headers from the OEM manifold.

Cool

Who else came here thinking it was soccer headers?

It had as many horses as pat had random things in his shirt pockets

I have a 2007.5 Silverado 5.3 vortec I like to get close to 700hp it will be my daily driver I am running 37 tires on 20 rims what do u recommend I saw ur video on junk yard ls I like to keep it like what my truck is thx u

Did they edit out the time it took for the Permatex to set up?

anyone else see the crack in that weld on that first runner?

Nothing new here. Since the dawn of hot rodding us old timers knew they were good for 20-40 on most muscle cars.

which episode is this fellas? I hate seen this short clips on my laptop

Pat the pen guy lol

If you didn’t know it was going to pick up with the optional pattern headers you need to catch up!

Right. But how long a tube is too long a tube?

Wish Mike was still on the show

How about on a Ford 6.0 diesel,?

Never have 2 inches been more important.

Yes

Is water wet?

What about shorty vs long tube?

I have a 2020 Ram 1500 5.7, It's my daily and I just want some increase in power and torque. Which is the best way to go? I'm not racing but I do tow from time to time.

Nice a 408.

Where's the other guy that co hosted?

So for my 08 mustang V6 would it be good ? I’m tryna make it loud and pop more

Pat you and Mike not Frankie are the biggest dorks on a dyno ever

How many pens does the TV Mechanic need?

I really like these guys. They never tell me I can build 600 plus hp with junk parts lying around. Or the other crap most vehicle build shows try and tell me

Not a mechanic,so I just want to comment that I noticed not much increase in torque in comparison to the huge increase in HP. Isn't the torque the aim ?

If you are into changing header gaskets on a street engine, go for it.

3 inch tubes 600hp

1 5/8 tubes is the max you should do. 850hp Nascar engines use this diameter

Moooore powweeeeeeeeer

Comment below beat me to the punch!

Why do so many people prefer long tube then if short tube have superior numbers

I really wanted to build this engine, then, some person pulled right out in front of me and totaled my 93 Mustang GT.

Why he put sriracha on the headers?

I put headers on every car all it does is make it sound smoking-hot past 5000 RPMs oh yeah and for like 10% more power free

😎🖖✌️👌👍🤓

They don’t start working until you get to 6000 rpm, most people never do that to a v8.

Good luck fitting 2” primaries on a newer car.

Hey Pat, maybe you could take the 20 lbs of crap from you're pockets & belt.

This guy seems a scarsone

First

To much to fit in shorts. I really hate these shorts. #shorts are dumb AF

It’s foot-pounds !!! FOOT-POUNDS not pound-feet

You guys don't even exist anymore I'll never see you on TV and I know you're not in Murfreesboro cuz I went and tried to find you

Yes