[brewcitybirs]

Does any one make round port headers for 73-77 a-bodies? The only ones I can find are the Doug’s for 70-81 Firebirds. I know the front frame horn the 73-77 was patterned after the 70-81 f -body but I don’t know if they will work. I actually have a 75 Grand Prix but from what I’ve been told the frame is the same from the motor mount back.
Thanks, Jay J

[73LeMans]

I was really hoping to find some, but I looked at Hooker, Hedman, OBX, Dougs, MadDog, Flowtech, Patriot, and then Tin Indian and KRE hoping to find some but it seems they don't exist. D ports yes. Round ports no.


Hedman makes the 35130-6 that Summit says will fit a 73 GTO, but the Hedman Website doesnt agree.

https://www.summitracing.com/parts/hed-35130-6

That'll take a phone call to find out Hedman is probably correct.


Jegs has P/N 555-30065...but while the description says "Cylinder Head Port Shape" is round, it goes further to say it will NOT fit Ram Air cylinder heads. Likely a D port.


Now you can understand why I had mine made.

[brewcitybirs]

Yeah maybe in the future I will go that direction but guess I’ll be running RA manifolds for now.

[JayTee]

73LeMans is right, there isn't a company that makes ram air headers that will fit 73-77 a-bodies. I scoured tech lines and company products for months w/ no luck and i wasnt willing to try ram air headers for a 72 a-body or firebirds. Closet i found was Stainlessheaders.com that makes a build your own kit that I believe you can get in steel or stainless w/ up to. 2" primaries. I ended up going with Eddy Dport heads so I have never used that companies products & I can't verify the quality of their kit.

[cdrookie]

A little late to the game but 2nd gen F body headers fit. I had Hedman hustlers on mine and they fit great. They won't fit if you're running a standard trans with mechanical linkage unless you extensively modify a tube. I have OBX on it now. They look better but don't fit as good.