The real advantage of the more expensive headers is the larger primaries and the less pain to deal with and install. They all have their problems though. I have TOG Extremes on my car but I got em for a ridiculously low price. If I was going to buy retail I'd probably buy the pacesetters with the ZZP package that gets rid of the bad/prone to fail parts. ZZP APPARENTLY claims that their headers make 20WHP more on the dyno than competitor headers (on a fully built car). I have no idea how they can claim that as it seems excessive.
I wouldn't get the speed daddies because a few of the parts need to be changed out right away, and its a really stupid design on the sewer pipe (goodbye ground clearance) and because they have smaller primaries. If you're not planning on making max power or going too far with your car and dont mind fabricating a bit im sure they're fine though.
