I started to do this, then read further. I read that the lifters and engine ticks and taps are more apparent with this cover off...so that decided it for me. I've already got a tick while DOD is engaged...sounds like a diesel truck in AFM mode, but goes away when all eight kick in. Several ticks while at idle, and the infamous alternator whine. GRRRR! The holden covers work with the intake cover on there right? I'd like to do the covers, oil cap and radiator cover for sure...