This is a pilot controllable baffle that controls air flow through a front mounted oil cooler on a supercub or pacer. It came with a cub I bought years ago. I never used it but the guy I bought it from said it worked great. No more landing to take off the blocking plate when it gets too hot or flying along with 120 degree oil wishing you had it on. I switched to a rear mounted cooler at rebuild and can’t use it.
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