Just Sharing This Brake Master Cylinder Trick

I was shocked to see the price difference between standard DOT-3 and DOT-5. Holeeeee Crap! A quart of the DOT-3 is under $10 and the good stuff was almost $40.
I'm doing a huge brake upgrade in my Charger and DOT-5 is part of it.

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What rotors and calipers are those? Are those calipers aluminum?