weiand 7512

With all the intake manifold test ive read over the years why has nobody included the weiand 7512. This is the best manifold I have used on my bracket 440. It beat the victor, the holley sd and m1 by about 7/100s and gave me my best 60s and mph. which is 6.68 1.42 and 102 mph in the 1/8 mile. Maybe I would see different results in the 1/4 mile. Anyone else had good results with this intake? I wonder what they flow? This is the old x-celorator.