I haven't had any heat issues with my grill block yet, and I gained around 2 mpg between the grill block and removal of the a/c components.
Summer in Florida will be the true test. I like the front air dam you added, I might try one too, I'll probably just copy yours. I still have enough flashing left over to add the rear skirts, and I think I'm gonna also copy your kammback since you already did all the leg work, nice job!
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