How does a .81 a/r exhaust housing work on the 6.0l motors? I am running 9 psi and currently have a .96 housing. I would like it to spool up a little sooner. Anyone try this and like it?

Also does anyone make an adjustable fuel pressure regulator that fits in the stock location?

 

might wanna try this in forced induction or gm performance. would get more hits there.