Not sure how far along you are on the belly tray. Some tips.
Home.depot sells light aluminum window frames for.mesh window that make a great frameto mount your under tray.
Be sure to leave plenty of.space around your exhaust, or the coroplast will eventually warp. Coroplast will.warp around the engine and tranny too. Maybe use aluminum in this area instead.
I noticed.a 2-3 mpg gain overall with a belly tray.
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