Brightersiderock

I am going to be getting the flowmaster american thunder cat-back system for my '94 GT in a few weeks, and i was wondering what the best headers would be to get for my car, and how much horsepower would i gain? I don't really know to much about them...

i should also add that everything is stock on the engine, since i have not had the money to ad any mods until now.

w8less

i would prolly advice getting some BBK short headers or the equal headers with an o/r h-pipe if u don't have to worry about emissions where u live. i have the bbk lt's but there just a pain to install

sc94gt

BBK equal lengths ceramic coated. My brother has them on his 01 GT. They look really sweet.
You will gain some HP... really lets the engine breathe.
I got some good gains with my Macs too. Get some metalic gaskets if you are worried it may leak. Re-torque them after a couple runs.
I used the "paper" type gaskets that came with my headers and pre-soaked them in water before I installed the header. No leaks.
It WILL be tight to get to the header bolts, maybe even getting the engine off the mounts a little may make them easier to install.