Re: Plenum pull scope creep
From what I remember, the Power Plates were made by AO Engineering. I might still have the original instructions somewhere with all the paperwork I got with the car when I bought it. These were installed some time between 1995 and 1998.
I'm attaching a couple of pics, but they look like some sort of phenolic resin type insulator that was intended to mitigate the heat soak into the plenum. I read a long time ago some people had hood clearance issues with these and I do see some marks on the underside of my hood from the ribs of the intake boot. It doesn't look like there were any other clearance problems.They're just under 5mm thick.
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