NA Slant six vs 440

Yes,Thanks Charlie.A pig,or sometimes called a turtel,mounts on the bottom of the manifold.This one is about the size of a tennis ball cut in half.In theroy it will slow down the flow to the 2 inner runners and give a more even flow, and mybee increase overally flow by makeing the big open chamber smaller.Does this make any sense??I will test and report.Mark