I have a Mr Turbo Plenum which is a two piece unit made from billet aluminum with 1/4" thick walls. I'm fabricating new sides and top for a taller one piece unit with the air inlet and BOV mounted on the front. I have access to enough 1/8" aluminum to complete the job. Although the system is at 10psi for now, that will all change over the next two years so I'm also looking ahead. Is 1/8" aluminum sufficient for a plenum?
