This manifold will fit a 10-71 thru 18-71 roots or screw blower but can be used with a set back plate if a smaller blower is to be used. Opening in the manifold where the blower mounts is 16.125" x 4.00" and has been machined for an O-ring to provide a superior seal between the blower and manifold.
Manifold is machined for a standard SFI burst panel in the front with a AN plug in the rear of the manifold to fill the engine with oil. Ports are 2.250" x 2.125" and mounting bolt holes are 4.750" on center on the inner three stud holes. Manifold is 5.750" tall from deck surface to blower mounting surface and is machined for port nozzles with three holes drilled and tapped 1/8" pipe per cylinder. Manifold has one 1/8" pipe thread provision in the rear which is currently plugged at the rear of the plenum for the buyer to plumb a boost a gauge into if they choose.
Manifold is in good shape with no repairs or any major modifications done to it. Someone built some cool sheet metal plugs so manifold nuts can't be dropped down out of reach and looks like they used silicone to hold them and could easily be removed by the racer if they choose.
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.