Swear i just gained 20 hp

wstar

For mine, I just measured the dimensions of the front of the cooler, then went to a hardware store and bought a sheet of thin (1/16" I think? maybe less) aluminum that was a bit larger, and cut it down to size with tin snips.

Then I got some tough velcro tape strips (keep in mind the heat of the oil cooler vs the glue here!). I put the spiky side of the velcro in two vertical strips along the front side edges of the cooler, and I put the fuzzy part of the velcro along all four edges of the blockoff plate (the top and bottom edges just being to prevent vibration against the cooler).

I have to remove my undertray to add/remove the blockoff plate, but it's pretty much a seasonal thing anyways, so you can do it during an oil change or whatever. Just put it on for the winter a few weeks ago, and other than track days it won't come off until sometime in March probably, once I start noticing higher oil temps on the street.

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7AT Track Car!
Journal thread / Car setup details