I'm about to just throw a piece of R16 or whatever in there. full fluff is 3.5" and is single digit dollars. I have a full upper and lower grill block on my prius and it still doesn't maintain temps, but it does do pretty well, it doesn't get those 50 degree swings like normal priuses. I think the insulation would be the last push it needed to be as good as it can get.
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"I feel like the bad decisions come into play when you trade too much of your time for money paying for things you can't really afford."
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