I'm telling that to the race gas you have to use to run that way.
And not believing in headers doesn't have any thing to do with weather it pings or not.If you have to run a mix of 110 octane then that throes the hole pump gas thing out the window.
Never thought it had anything to do with the exhaust. Only that you can hear the ping better without headers. It's pump gas. I drive up to the pump/pumps. Just as soon as the racing fuel pumps disappear I'll have aluminum heads.
