Reply to "What is the point of 180 headers?"

Just to add you will find it's the two middle cylinders that are crossed over on each bank. This all balances out the firing order as the next cylinder to fire exits out the opposite header as this is not the case with regular headers. As mentioned this is eliminated with a cross over pipe yet it's not as efficient as a true cross over header. The back two cylinders get the extra pipe added to make all cylinders have an equal length tube. It's definitely a different sound. This discussion could be taken deeper as you could get into the intake side of the engine and find that independent runner system would be the ultimate as a 4bbl intake has two short runners in the center and longer ones to the outside cylinders. That's another story....
In the end you have a good pizza warmer.