Small port opening is 6.750" x 4.00" and racer should have the blower manifold modified to match the small port plate if chosen to buy this plate.
Plate goes between the blower and blower manifold and is made from .250" billet alum. and is black anodized for longevity and O-ringed to provide superior seal. The plate has been machined to allow the air to come out the bottom of the blower and be routed to the cylinders to help try and even up fuel distribution.
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.