CavFabs showed up.
CavFab 63.6 lbs per pair, not counting hardware.
Poison Spyder Rocker Knocker 60.8 lbs per pair, not counting hardware.
Makes perfect sense given the lack of step but the addition of the extra length and under-tub coverage. I'll be modifying these to get the most out of them.
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edited for clarity
Dumb question… did they come with install directions? I’m wondering if they come with nutserts for the front two bolts or if they say to drill all way through the floor