LettuceHead

Looking to replace stock headers on my 84 Hurst/olds and was wondering what the best long tube options are.

rickw30

Have you looked at ARH. Very pricey but well made with good fitment.

Olds64

Unless you buy a quality set that will fit without modifications, I suggest you get the cheapest ones possible. Then just use a BFH to make them fit.

I bought a set of Hedman Headers for my 71 98 and spent over $500 about 8 years ago. They fit great but the ceramic coating has failed. They definitely look JALOPY! I might have to remove them and wrap them or get them chromed. Header paint is a waste of time and money.

Good luck.👍

olds 307 and 403

Does it have the complete stock exhaust? If so tuck it away if it isn't completely rotten. One member on the G body forum used the Ebay stainless headers on his 87 Cutlass. It actually fit better than on my 70 Cutlass which they were designed for. If you can find them, give it a shot. Very thick and well made and stainless. About half the price of Flowtech which rust quickly or Hedman. The ARH headers are great but ridiculously expensive.

skyhigh

I'm probably going to re do the hedman headers I have when I swap motors, I will blast them and then I'm thinking TSA them.

Olds64

That's awesome! I never knew about TSA coating. I wonder what the durability is for headers?

https://metalinkwear.com/what-is-tsa/

LettuceHead

cats and mufflers have been replaced with cherry bombs but the headers are original and getting old and ugly. Not in an urgent rush to do it but definitely in the near future. Thanks for the info!

LettuceHead

Thanks!

skyhigh

we have sprayed the Aluminum on pipes at work every bit as hot as headers, the durability is amazing but the metal needs to be white, some people may not like the texture of the TSA, its far from a smooth finish but its Aluminum and dries immediately, just wait for the metal to cool down before handling lol. You have a good read on that you posted to give an example of the durability.

olds 307 and 403

Sounds like a great option Dave.

LOUCKES'6487

Have used both Hedman and BlackJack in both B and G body SBO of those years exactly and in H/O.

Fit was good without issue, you'll need to mod the trans mount crossover for a double hump or have pipe issue on the extension past . Since your 84 had only one cat and ran one side, but not a big deal to get the clearance. Assume your 307 is still on the brain box so you'll find a place for the 02.

"Factory stock headers" , must mean the ss manifolds.

Use the best thickest header gasket, bolts were a little tight to reach but you'll find out, retorque again after a day or so and they won't leak.

Properly stripped and washed , then​​​​​​ hi temp primed with correct hi temp paint done with direction dry times between coats and proper cure has lasted exceptionally well. You must get in-between the primaries at the collector without fail from the first step. If you're into harsh climate and salt with gravel roads, things don't last as well.
​​​​
A true coating is best.

69HO43

Shouldn't be on VIN 9 cars. All G-body 307 used cast iron exhaust manifolds in 1984 and prior. The dog "logs" came into being in 1985-up with roller cam Y engines. H/O and 442 all used cast iron exhaust manifolds. Unless someone changed them out on the H/O for some stupid reason.

LOUCKES'6487

It would have been, they were 7A port pipes I think.

​​​​​​My 84 "9" is at the back of the garage, only ever saw cast on those. Swapped for a better sbo.
Had an 88 roller in a big Cadi , they could carry a load down the highway but ran out of breath very early.