Plate is drilled and tapped with twenty 10/24" thread holes that will work with industry standard SFI burst panels. If racer needs a burst panel and frame be sure to check out part number #2000-0014. The 3/8" bolts intersect with four of the 1/24" holes so only twenty bolts can be used to attach the frame to the burst panel adapter.
Plate measures 6.125" x 3.125" with a 3.50" x 1.750" hole in the center to let boost out of becoming to excessive. Hole is offset in the plate so it sits down below the blower surface. Fits all early Weiand manifolds that use the 3.50" on center backfire valve four bolt pattern. These were common on early BBC and 392 Weiand manifolds, back when they said Say Why-And on the castings.
Includes 3/8-16" plate mounting bolts.