HEADERS Man-a-fre, SOR or ??

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Hey guys, aight, my truck still has the original exhaust manifold, i put new gaskets on it about 2 years ago, doubled up with ultra red silicone and still no leaks (knock on wood)

Anyway, everyone is going to say don't get headers because they don't seal well, but i've done some research and it looks like the 2-3-1 headers that sor and Man a fre sell are quality.

Here's what i want, i want my diesel tractor motor to sound like a small v8, possibe?? Well jeep inline 6s have done it, and are pretty similar engines aren't they?

So bottom line, with good headers, dual exhaust, and some flowmaster 40 mufflers make my truck sound like this.
YouTube - 258 inline 6 exhaust

Also, i know these engines arent designed for horsepower, BUT do these headers add any performance gains? And i don't wanna hear any of that " if you want it to sound like a v8 then do an engine swap"

Thanks fellas
 
That sounds nice!! Using the SOR split headers into dual exhaust should be pretty easy for somebody with good pipe bending ability. I would be a little concerned about the lack of backpressure with a system like that on a LC 6. Not an expert on the topic but low end power and no backpressure don't seem to play well together.
 
My 2F sounded like a V8. I had the Downey header and 40 series Flowmaster muffler. Unfortunately it was to loud and I couldn't hear my kids in the back so I just switched teh muffler to a Turbo muffler (kept thr header). This muffler still gives a rumble but a bit softer. The wheel base is so short I would bet with just a 40 series muffler you get the rumble.
 
I am running the MAF two piece header and haven't had any issues with leaking, etc. It is on a 79 so I was originally using their downpipe to attach it to the stock cat location. I ditched that a couple of years ago and now have it running into a dual 2" to single 2.5" cat in between the frame rail and transmission. From here it runs above the frame rail and around the gas tank to the stock-ish muffler location where I mounted a flowmaster crossflow 80 series with a single inlet and dual outlets. This is a camaro style muffler so one of the outlets is on the same side as the inlet. From here it runs to dual edelbrock tips.

The problem that I have had with the header is the packaging. I rerouted everything the way I did to get it tucked above the frame rail. The original downpipe ran below the frame right behind the front drivers tire and was pretty vulnerable. With the cat now being between the trans and framerail it heats up the floorboard pretty good, and I have concerns about how much heat it is dumping into the trans. I am smog exemp now (over 25 yrs old with collectors plates) so I am considering ditching the cat and just running a Y pipe in its place. ( I already desmogged everything else)

When I did this re-route I lost the "equal length" piping between the two pieces of the header, which is one of MAF's selling points. This equal length principle provides for better scavenging since the exhaust pulses are traveling down the exhaust pipe in even spacings, and the pulses downstream help pull the pulses upstream along. I haven't checked to see what sort of downpipe they provide for the earlier non-cat application.

If you are planning to run duals however this is a moot point. Have you checked to see if they offer flowmaster 40's in 2" or so, I don't think you should run anything bigger than that or you might end up losing power.

Another issue to consider is that you will need some sort of system for heating the floor of the intake manifold. I am running a coolant type system right now, and it can be a PITA when it is cold outside, I have to run choked for a lot longer than I used to or the engine stumbles. The stock manifold does an excellent job of heating the intake but this is also one of it's downfalls because it uses a butterfly type valve to sort of trap the exhaust gases in this area.

SO, long story short, yes the header will make your engine sound a lot better. And I think it is highly related to this butterfly valve. The header did a lot more for the sound of my 40 than a high flow cat and new muffler did. I really like the sound of mine, it has a low rumbly idle, and sounds pretty mean if I wrap it up. You just have to consider the downside to running a header as mentioned above. I am also not sure how much power I gained by switching.
 
Hey guys, aight, my truck still has the original exhaust manifold, i put new gaskets on it about 2 years ago, doubled up with ultra red silicone and still no leaks (knock on wood)

Anyway, everyone is going to say don't get headers because they don't seal well, but i've done some research and it looks like the 2-3-1 headers that sor and Man a fre sell are quality.

Here's what i want, i want my diesel tractor motor to sound like a small v8, possibe?? Well jeep inline 6s have done it, and are pretty similar engines aren't they?

So bottom line, with good headers, dual exhaust, and some flowmaster 40 mufflers make my truck sound like this.
YouTube - 258 inline 6 exhaust

Also, i know these engines arent designed for horsepower, BUT do these headers add any performance gains? And i don't wanna hear any of that " if you want it to sound like a v8 then do an engine swap"

Thanks fellas





I was going to say, don’t change anything if it is not broken, and try and make you realize that you are not going to bolt headers onto your Land Cruiser six cylinder engine and ever get more horsepower out of it to the effect that you will be able to feel it in the seat of your pants, but after reading the rest of this about how you want your six cylinder engine to sound like a V8, my only suggesting to you, badass, is to sell your truck.



No, really, sell you Land Cruiser and get a Ford, Chevy or Dodge truck with a V8 or V10 in it and realize your dreams....:smokin:







:cheers:
 
I have a downey header on my 79 that I have had very few issues with leaks. I have a 2-1/4" system all routed above the bottom of the frame for clearance and around the gas tank with the muffler in the stockish location like Toyoland66 describes except I have a single 2-1/2" tailpipe with a stainless 3-1/2" exit tip out the passenger side. I originally had it set up with a flowmaster 40 series and at idle and up until about 2000rpm it sounded really awesome, a lot like a V8. A lot of people were very surprised to discover It was actually a 2F including a lot of people who owned cruisers. HOWEVER above 2000rpm or so it was so freaking loud it was unbearable. And it sounded more like an a hopped up ricer than anything. So I pulled the flowmaster, gave it to a buddy building a 61 impala and put on a cheap thrush turbo muffler. Now it's fairly quiet, but still has a throaty sound at idle and sounds good when you wind it up.
 
Yup! If your diesel is in good shape you can sell it for a pretty penny and get whatever JC Whitney exhaust that suits your horsepower and NOISE needs and VROOM/RUMBLE/POP on down the road in something with 44's and four barrels...:steer: Seriously though I have a 2F that everybody thinks/swears is a V8 and to me I could care less but some people love it. Funny enough my ideal set-up would be a diesel. If you wanna drive out to Oregon I'll trade you and we can both be happy, but if that isn't gonna happen my 2 cents would be that we always want what we don't have so we should "wheel" what we got aka "run what you brung" and fix/improve stuff as it breaks or gets outgrown. With headers it does take longer... to warm up but in your area you might never notice.

another idea; it's small and built in heat shield
Flowmaster Hushpower II - Flowmaster 12018300 - TruckCustomizers.com
 
Can I ask what "Tractor Diesel Engine" you have? (Size, cylinders, etc etc..) I don't believe its possible to get a diesel to sound like a V8. You can up size the exhaust and make it sound louder and beefier, but you will probably sound like a old delivery truck or something to that effect.
 
Diesel tractor engine = 2F

I think.......

Okay. Yeah, I'm still a newbie..:lol: I pretty much kinda figured that since he wanted to know about bolting up a 2F part to the diesel engine, but I just wanted to clarify. :)
 
My straight six gets mistaken for a V-8. occasionally. At idle. With the hood closed...
I've run a few headers...I like the Downey headers I'm running now.
All headers take work to fit. Put 'em on and take 'em off. Grind, dremel and file.
How they fit depends as much on how much effort you put into it as how they came from the vendor.
In my case, I found the Downey's to fit better and require less work to fit right.
 
I thought he was just adding hyperbole with the "diesel" part.

Did you not read the saga of the Downey TBI install? I didn't think you could do that with a diesel.

Rocky
 
Hey guys, aight, my truck still has the original exhaust manifold, i put new gaskets on it about 2 years ago, doubled up with ultra red silicone and still no leaks (knock on wood)

Anyway, everyone is going to say don't get headers because they don't seal well, but i've done some research and it looks like the 2-3-1 headers that sor and Man a fre sell are quality.

Here's what i want, i want my diesel tractor motor to sound like a small v8, possibe?? Well jeep inline 6s have done it, and are pretty similar engines aren't they?

So bottom line, with good headers, dual exhaust, and some flowmaster 40 mufflers make my truck sound like this.
YouTube - 258 inline 6 exhaust

Also, i know these engines arent designed for horsepower, BUT do these headers add any performance gains? And i don't wanna hear any of that " if you want it to sound like a v8 then do an engine swap"

Thanks fellas

Don't get headers. Just get a new muffler if you want a deaper sound.
 
headers and performance

headers should add performance in theory and since MAF and other landcruiser specific headers are designed for our application you would think that would be taken into consideration

the length of the primary, the collectors, and size of tube all affect how much and where the torque point will move above or below the stock peak torque point and how much HP can be realized.

Of course never spinning the engine too high means a limited gain

Cast iron is used by the OEM because it delivers decent all around perf and is much more effective at reducing noise but then again some of us like engine noise hence the headers.

with the right tuning I think the engine will run a little better desmogged with headers than in stock config but that is most motors where things are compromised for emissions purposes.

True that the sound can come from a muffler change
 
I've run both the SOR and MAF headers. I liked the SOR better, but they got a hole that couldn't be fixed, and besides, they take up a lot of real estate under the hood. You need to dismantle things to put them in or take them out.

I am currently running MAF, and like them also. Neither one had leak issues.
 
I never liked the way the aftermarket headers hung down below the frame. Mud cakes them up & they're too exposed for trail damage, so I made my own. I used my old MAF 6 into 1 header flange, cut off the rusted out tubes, bought & bent up some 1.5" 1/16" wall DOM & fabbed up the collector. Now they hang an inch below the top of the frame. I have since had them hot coated. Oh yeah, these work for a front 4 link too :smokin:
DSC00476.webp
 

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