I added a spectre closed box system to my pushbutton this winter too. I wanted to keep the original look, so the box is with small mods kept under the screen, and I have one intake through a scoop in the driver side wheelwell (next to the fueltank), and the other routed to under the battery box (which sits in the passeger side wheelwell on early euro cars) to the right underside pointed outward (outside right). I did test the temperature at both scoops, and at normal highway speeds it's very close to outside airtemp. It's clearly an impovement to engine performance, especially at speed. Sorry for the low-res picture.
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