bainer1290

I can't seem to match these up to any olds 455 header pictures on google. I was told they came of a 455 anyone recognize them? Trying to determine a brand...

Thanks

joe_padavano

Is that really one larger tube on the center two ports on the passenger side header? These aren't exactly equal length, are they...

bainer1290

Yeah it almost looks like the passenger is a 3 tube, these are the pics I got from the seller, looks odd. I will get him to look hard to tell at this angle.

70cutty

Those are Mondello G-body Headers.

bainer1290

That would be why they look a little off, thanks 70cutty!

I'm guessing they won't fit my 72 Cutlass then...oh well they were in bad need of paint anyways.

jag1886

They look like REALLY cheap headers I wouldn't buy them if they where $20.

bainer1290

hahaha yep they do look pretty rough

Killian_Mörder

Not only rough. The tubes aren't of equal length and one is siamesed. Might be some homemade H.A.M.B.o stuff

bainer1290

I think 70cutty was right they are Mondello G body headers they look identical I think the angle is fooling us and they are well used

seansolds

That drivers side header looks very close to my flowtech header on my 1973 442.look at 3 rd cylinder tube goes to the back and turns down..that's built for clutch z-bar to go threw those two tubes..like mine does.. But the passenger looks odd.

bainer1290

How do you like the Flowtech's? Been looking at them they are a great price.

seansolds

They are to small for what I run.. I need to replace mine with a larger primary header but using money in other project now.. So mine is tuned with just bullet style mufflers..these headers are designed for stock or moderately modified engines or high performance if your running open headers all the time..I purchased ceramic coated in 2002 or 2003 they show little rust just in tight spaces like tube to tube and the fit great on my car...well worth the money spent.. I run on Friday nights uncapped that's when they sound good...and work well...

Killian_Mörder

Either run equal-length tuned headers or go with 4-2-1 type construction. The 4-2-1 are the most practical way and offer a power curve best suited to street use. I don't have the original images. But, H.A.M.B. pulled a post of mine which was similar, when Olds owners wanted to replace the manifolds on their old '50s vehicles and were welding together homemade headers which didn't have any scientific merit behind them. They would upload pictures of them, without any sign of shame. Those things looked like some of the projects we did in junior high as 12 year olds in metal shop. The mods there seemed to get a kick out of them making fools out of themselves

http://au.toyotaownersclub.com/forum...azda-skyactiv/

70cutty

I wouldn't waste my money on Flowtech. You get what you paid for.

seansolds

Flowtech headers work fine..they are not a waste of money...and budget is always a factor anyway..the technical advice is appreciated along with the detailed upload of photos..depending on engine application and what you are going to do with it you can spend 250.00 to 750.00 and see a difference in 10-15 more horsepower..don't waist your money on big dollar headers.. I've had mine running on my car for 12 years..that's a lot of bang for my buck..

70cutty

There is a lot of issues with fitment on early A body cars (search the threads) where you have to modify them to fit. In my opinion I would rather spend extra money on good quality headers that I don't have to install with a hammer.

bainer1290

Sounds like Flowtech might have some issues, for $100 more there are Hooker 3902 and Hedman 58150 options. Any opinions on either of these?

http://www.summitracing.com/dom/part.../model/cutlass

http://www.summitracing.com/dom/part.../model/cutlass

70cutty

I would go with Hooker. Better quality, thicker steel.

78 omega 468

Not trying to steal the post, but along the same lines. I have a set of Doug's Ceramic Coated Headers new still in the box. Were bought for my 69 442 and were never swapped on to the car. I have bought a 67 Cutlass and built a 425 to go in it. Does anyone know if the headers designed for the 68-72 A body cars will work on the 67?

Killian_Mörder

My dad had a '67 F-85 and there was plenty of room under the hood. All they did for '68 and up was to round off the edges on the body work. Other than that, everything else relavent under the hood should be in the exact same place

1977 C-10

What is that HAMB stuff for?

Killian_Mörder

That stuff is the result of good advice prohibition. The mods, there, don't take into account that those guys welding together a bunch of pipes are ruining their classics and are likely prone to tossing their original manifolds into the metal bin. Or if they indeed take it into account, they're entertaining themselves at the expense of those who don't know better.
If someone absolutely wants to weld together a set of headers, that person can come close to equal-lengthed tubes, by getting some of that flexpipe they used to sell at autoparts stores, back then. You know, the type which was installed on old Cords. They could cut all that tinkerer flexy to equal lengths and then tack weld each to a flat piece of 1/4 inch plate and drill only the outer two mounting holes which would be just enough to hold the plate onto the block. Then, mount each end into a flange, fotograph the assembly and then weld their real headers together, copying the Tinkertube toy

bainer1290

Here's another mystery set, anyone know what brand/model they could be? Supposed to be for a 68-72 Cutlass.

70cutty

Hooker 3901 for SBO.

bainer1290

You are pretty good at knowing headers haha

So small block will be no good for a big block 455?

70cutty

No, they will not fit due to BBO's height.

bainer1290

I figured they probably had a different pipe bend/arragement. Thanks again