Considering the fact that Forced Fab (formerly the rip off company, that stole tons of customers money, known as ITS) has never sold a set of these untested or even used "log manifolds" I don't know...
I would avoid them like the plague personally.
If you want cheap turbo "headers" then jump on the MSDS group buy.
You can buy the MSDS headers and make you own hot side pipes for under $1000 easily. Heck for that $1000 you would even have enough piping to make the cold side.
If you are really lazy you could buy just the up & down pipe from ADC and use the MSDS headers. It's as simple as cutting and rewelding the front header's ball socket to match. It does not get any easier folks.
I told street flight (ADC) years ago to sell a kit based off MSDS headers. It would have cut the cost of the cut by over $1000 easily. (i.e. it would have made the kit under 4k at the time!)
