1. You have posted the same number for each brand. They are all the same. They are the correct number for rear TF 1/2T.
2. The tabs that stick out are safety stops to keep the piston from coming out. The boot will nest around the stop.
3. The front number is 14493 and 14494.
4. Front is 1 1/8" bore, rear is 1" bore.

WC= Wheel Cylinder
UP= Ultra Premium
Prefix does not matter

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