I read something about Demon that said they saved 16 lbs on the front. The Demon used an aluminum 4 caliper that was not used again until 2021.
Up thru 2020 (except Demon) the caliper weights between 4 and 6 was about the same due to the heavy iron caliper on the 4, roughly 12 lbs ea. The 6 caliper all aluminum.
The 6 rotors were 4 lbs heavier at about 31 lbs than the 4 rotors at 27 lbs.
In 2021 the 4 caliper was changed to aluminum monoblock (same as Demon) and it was lighter, not sure how much, maybe 4-5 lbs? Dodge or somebody said 8 lighter, don't know sounds too light but maybe.
Also in 2021, the 6 rotors got bigger so maybe a pound more weight.
The 2020 Super Stock was the only Hellcat to use the heavy iron 4 calipers.
So the lightest 4 caliper compared to the current bigger 6 rotor setup, you might have 5-6 lbs per wheel or just go with the 16 lbs number that was posted.
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