This manifold is machined for a SFI burst panel and drilled and tapped 1/8" NPT in the rear of the plenum for a boost gauge. Manifold comes Dow-7 satin finish and will fit a 6-71 thru 16-71 roots supercharger.
Plenum opening is 13.00" x 4.875" that is machined for a roots set back plate that is included and ports measure 2.625" x 1.875". Ports have two 1/8" NPT holes per cylinder for single or dual port fuel systems and mounting holes look to have some adjusting done to get the bolts holes to line up to the heads at some point in the manifolds life.
This manifold is 6.00" inches tall and there are no water provisions. Set back plate is made from .650" billet alum. with a 7.750" x 3.875" opening. Plate attaches to the manifold with six 7/16" flat head bolts.
To see if your blower will line up on the plate measure from the center of the second stud to the edge of the discharge hole which on the set back plate it is 6.00", then after that the measurement is 10.750" so there is over four inches to machine a different discharge hole if need be.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.