M1 Tunnel Ram Top Plenum Volume Reduction with Photos

Yeah it peaks 58-5900 but still carries pretty well out to 67-6800
Pretty close because based on those numbers if I’m right about the intake length peak would be 5850, cam would influence it too. But appears to be pretty close. You could always shorten the length by milling the base where the top bolts but then there’s no turning back unlike adding a spacer lol