96 S14...The hotshot header I was using on my car along with a CAI/nice exhaust and no cat made a noticeable difference in upper end power...I think it's worth it, especially if you're not turboing, or not planning to for a while...You'll be satisfied with the I/H/E for a while I think, at least I know I was...
Edit: Mine is for sale, $230 shipped, used only 4k miles, very good condition... (for an s14 too), email
[email protected] for pics