Silvertop velocity stacks - trumpets?

[jondee86]

There are plenty of pictures on the internet that show trumpets with
the rear one cut to avoid contact with the brake booster. Right now I
am getting some curved trumpets made for the same reason.

However, I don't think that trimming the trumpet bellmouth on one
side is a big deal. Some tuners use large diameter bellmouths and
trim both sides where they butt together. Sure, there will be some
difference in flow between the best and the worst trumpet, but I have
never seen any figures to show the percentage.

My gut feeling is that the benefits of having the trumpets, far outweighs
any small variations in cylinder filling.

Cheers... jondee86