So after reading the reviews here I was 50/50 on pulling the trigger so I ordered the installation The AC line he was late Mishimoto has already pre-cut so you only have one take a wrench and bend it back and forth and it will fall off. The screws they provided were wrong. No big deal. I went to a hardware store to get them except this radio is beautiful. I haven't noticed any difference in cooling, maybe a little but you can't beat the warranty or what they look like