getting headers improved my performance dramatically. i felt less of the low end torque but my gain in higher rpms is killer. for example when i just had my intake and exhaust my friend would always pull on me in higher rpms. his car is a civic Si and these things are ferocious on the high end and was keeping up with him with my headers installed! i read up on the LC headers and i think that they are worth giving a shot, because of all the success they had on the 22R.
oops - i modified the header because it was for a 95-98 tacoma all i had to do is plug up the EGR valve flange on the last pipe on the header