Those are dyno headers only. I had to buy my own set because very few dyno operators that I've found have a set of headers to fit TW-R heads. My guy didn't, so I had these custom made to fit the characteristics of the engine. My dyno guy is top notch though...since I had to buy a set of headers just so I could use his dyno, he's going to buy them from me when we're through. So really, I wasn't out anything.

If anyone needs a set of headers made, these were done by Zemco Speed in Tower City, PA. These were $290, built to my spec, with O2 bungs and 2" tubes.