flowtech

I've used them also, on a standard steering and 4 speed, they go in reasonably well, all things considered. They do hang low and the ctr link in there, needs a bit of extra clearance for the stud to clear (file a few threads down, as opposed to dinging the pipes). Mine were ceramic coated, and it only took two years for it to start peeling. But for the $, if I was on a limited budget I'd buy them again.

I don't know if there's any substantial performance gain over HP manifolds with them.