Follow-up on "exhaust crossover"
A few clarification questions:
1. I've read that the "heat riser" ports are NOT really needed in fair weather states such as N. California, but then there are some that say they are recommended for daily drivers regardless of weather?
2. Are the holes in the "heat riser" metal plates designed to just partially
block the heat coming into the intake?
3. If I decide to keep the "heat riser" ports blocked, do I just keep them covered with the gasket? In other words, don't punch out the center gasket holes, or is there another set of metal plates that don't have a hole in them and block the heat completely?