I currently have a set of short tube headers - unknown brand - that I bought on craigslist and put on the car a few months back. Dirt cheap and obviously so. I've read a few parts reviews on the Ford Racing Short Tube headers and saw someone claim on a n/a motor to have gained about 20 RWHP. Anyone have any experience with these? Are there really any short tube headers worth getting - everything I've seen has pointed towards long tubes (and even those add only marginal gains).