I was thinking of going to a set of GT40P heads. The Ford catalog says the headers they have require "slight modifications for 1979-1986 Mustangs". What do they mean by slight modifications?
It means you need to use an 86-93 mid pipe with the headers. Not the stock y pipe. Basically, you'll have to convert the whole exhaust to 86-93 standards.
Is that all it means? I was planning on that anyway. The way the note reads It sounded like you have to do something to the headers themselves.
PoopDawg said:
It means you need to use an 86-93 mid pipe with the headers. Not the stock y pipe. Basically, you'll have to convert the whole exhaust to 86-93 standards.
Currently I am having a bit of trouble finding an original double hump crossmemeber. I know I could buy a reproduction, but I would prefer an original.
orangecapri said:
No, you just need to get an h-pipe from an 86-93 car and get a double hump transmission crossmember so it has 2 humps in it for the exhaust to clear.
Currently I am having a bit of trouble finding an original double hump crossmemeber. I know I could buy a reproduction, but I would prefer an original.
I hope to have a nice original double hump soon. When I get it, I will put it in with all new crossmember and mount bushings (urethane) and also bolt on the dual exhaust hanger at the same time.
89MustangGX said:
They're all the same. The FMS piece is about $40 and is not tack welded so you can use it on an auto or manual tranny. Brand new.