Headers?

[mustang2514]

Anybody running gt40p heads, if so what kind of headers are you running on them. I have a set of mac headers and there seems to be some clearance issues with the spark plugs.

[Jeff88coupe]

The only headers that fit P heads perfect are the FMS or Mac gt40p specific shorties. There are others that will fit...but some plugs are a bit tight...have to use 90 degree plug boot ends on them. I use to run a set of mac 1 5/8" lt's for a 5sp on my old 302 p head combo.

[Marker1989]

Do u have shorties or LT's? I have mac long tubes on my gt40p setup and I had no issues at all.. no need for 90* boots or any of that. Shorties will be a whole different story tho.

[mustang2514]

Yeah they are shorties, clearance is really minimum on the backside of the engine and i am just worried about heat from the headers. Thanks for your input so far guys.

[aperacer]

mac long tube 1 3/4 with fms stock type wires. no problems.

[Marker1989]

Well it looks like your going to be looking for new headers either way. Your choices are a P head specific shorty header or you can just go with long tubes. IMHO theres no choice, long tubes all the way! I went that route and dont regret it at all, and in the end I came out even after switching from shorties

[Marker1989]

or you could get some heat resistant spark plug boot protectors if there arent any other issues

[mustang2514]

Yeah, i will probably go with the long tubes, my exhaust needs a freshen up and its always easier to spend the money i dont have when i can justify it somehow. Thanks for all your help. Anybody need a set of mac shorties, lol.

[blown86lx]

I do pm me a price