I experienced this a few times. Eliminating any warp or binding issues with the intake, I found that the area of leaking can be resolved by a dab of rtv gasket maker and tightening down the problem area first. Get all the fasteners in first and before you allow the washer under the bolt to come in contact with the VC flange, tighten down the problem area first and then work your way from top and bottom to the other end. I think that some VC flex when tightened.