Why don't you tell me what you want, and we'll just make you one
. We don't have an "off the shelf" manifold, because not all engines are the same.
When do you want peak torque?
What power levels are you looking for?
What stock stuff do we need to work with?
What throttle body are you using?
What is the rest of the car setup for? (drag, street, auto-x, road racing)
What are the rest of the modifications?