Stainless works gt350 vs gt long tube headers

[nicolasfinta1]

I think they are exactly the same just with a price mark up I paid extra for the same headers and now have two sets

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[NGOT8R]

In reading the above instructions, it seems as if you simply need to relocate the four center studs to other existing holes in the cylinder heads and they should fit. I think you’re gonna be good to go sir.

 

[NGOT8R]

Have a look here at a GT350 cylinder head and you can see where there are extra holes for relocating the four center studs to obtain the proper bolt pattern for the flanges as indicated in the instructions.

 

[nicolasfinta1]

Oh

Have a look here at a GT350 cylinder head and you can see where there are extra holes for relocating the four center studs to obtain the proper bolt pattern for the flanges as indicated in the instructions.

wow so should I buy a gt gasket for the headers

 

[NGOT8R]

Oh

wow so should I buy a gt gasket for the headers

Yes. I recommend the factory stainless steel gaskets too. I bought mine from Lethal, but I’m sure other vendors carry them.

 

[GregO]

wow so should I buy a gt gasket for the headers

Post #12 summed it up for you.

IMO, I’d be a bit concerned the headers are not stepped tube designed and there is no provision for attaching the OEM exhaust damper.

 

[Red65]

As far as the pictures of the headers looking the same GT vs GT350 on the website, keep in mind stock photos are not always exactly the product you receive. They CAN be the same but if a company already has a set of photos that get the point across and the differences aren't really noticeable, they will reuse stock photos

 

[nicolasfinta1]

Post #12 summed it up for you.

IMO, I’d be a bit concerned the headers are not stepped tube designed and there is no provision for attaching the OEM exhaust damper.

Well I asked the parts farm and they confirmed they took it off a whipple charged gt350 so I’m assuming it’s gonna work I’ll update here once I install them

 

[NGOT8R]

Well I asked the parts farm and they confirmed they took it off a whipple charged gt350 so I’m assuming it’s gonna work I’ll update here once I install them

Get er up in the air and get em installed! I’m anxious to hear them.

 

[bauern]

Well I asked the parts farm and they confirmed they took it off a whipple charged gt350 so I’m assuming it’s gonna work I’ll update here once I install them

Doesn't mean anything as they don't know what the prior owner used. They just know they took them off that car. The previous owner could have just used GT headers. (FWIW, I have GT headers on GT350 heads).

 

[GregO]

I’m assuming it’s gonna work

I’m mostly referring to the 5.2 / 180° crankshaft power curve with stepped tube and the inherent frequencies that will crack tubing and welds.

 

[TXGTPig]

So am I reading this right? You can in fact use GT headers on a GT350, you just have to rearrange the header studs in the head and use a GT gasket? However stainless didn't inform you of this and sold you another set of headers?!?!?!

 

[DougS550]

On a 15-20 GT and GT350 MustangFrom looing at a Ford Dealership Web Site. Both 15-20 GT and GT350 Exhaust Manifold Gaskets are 9448, the same. The GT and GT350 RT Exhaust P/N 9431

 

[DougS550]

?, Isn't the GT OEM Driver's side exhaust manifold a P/N 9430? Due to the Cat being part of the exhaust manifold where the 350 is not?. Are you planning to run Cats?. Maybe I looked at it wrong. Good luck.

 

[bauern]

On a 15-20 GT and GT350 MustangFrom looing at a Ford Dealership Web Site. Both 15-20 GT and GT350 Exhaust Manifold Gaskets are 9448, the same. The GT and GT350 RT Exhaust P/N 9431

Don't trust them, they often show same part numbers when they are different.
"9448" is just the part description, i.e exhaust manifold gasket. Could be any year or model. You need to have the prefix and suffix for the whole part number. The GT350 uses GR3Z-9448-C while the 5.0 uses GR3Z-9448-D. A '17 5.0 for instance shows FR3Z-9448-(i forget).

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