I'm curious how much interest you've had in these since introduction. Also whoever has them what kind of gains have you seen? Has there been enough interest to drop the price any yet? lol I could use a new manifold for my 94 and I'd like to put headers on it but having to run a custom exhaust ontop of that I'm not sure if I want to commit to that much yet. Especially since I'll be getting rid of the truck when I get my diesel going. Also have you considered building one for the 4D55T? Since it's a turbo manifold would it even be worth building? It's pretty short as is.