I don't think any of the headers out there are worth the bux. They look nice, but PEM's work well and make more sense money-wise. Our Ex ports point upward, I would think that headers should too. That's prolly why all the availible headers have oversized primaries, to compensate. If you are considering headers, it wouldn't cost all that much more for a custom set.
A forum community dedicated to all General Motors makes and models owners and enthusiasts running the 3800 series engine. Come join the discussion about performance, modifications, classifieds, troubleshooting, builds, tunes, superchargers, maintenance, and more!