Don't know about your throttle body, but you could punch out the pre-cat material in the manifolds...Free if you do it yourself. Find ou how by searching the forums. Depending on what emissions testing you have, either replace your main cat, or punch it out too. 2 02 sensors cost about $52-$100 each depending on where you buy them. I know Brad Noon could probably sell you a set of "modified" manifolds. I would do the free fixes first, and see if it doesn't help, then work from there.
