the 95 to 97 had a factory tubular manifold, it's the closest thing to a header you will find. i was working on having one made when i had to sell my sportage.

95 sportage, gone and severly missed.
94 camaro 5-speed v6 with a few addons.
girlfriends 93 s-10 4.3 soon to be lifted and made into a pre-runner