I've been looking at the two abs plastic intake tubes and noticed the transition from oval to circular shape is very abrupt and definitely restricted and turbulent.
To fix that I would like to find a nice velocity stack to slide in place of the oval section to take up the oval length that I will be removing from airflow path. Does anyone know of an aftermarket company that makes spun aluminum or plastic velocity stacks? Something I could just slip into the intake piping would be great!