This is the COBRA 12" vented rear rotors and COBRA calipers. You will need to notch the caliper brackets so they mount behind the axle flange
You could cut the drum backing plate off but it would have to be done delicately or you could damage the axle tube and mounting flange. The time it would take you to do it you could have the axles out in 1/2 the time. It took me like 10 minutes to pull the axles.
- pull rear end inspection cover
- drain fluid
- undo center pin bolt
- pull pin out
- push axles in
- pull "C" clips (x2)
- pull axles out
Stock not notched
If u wanna notch them can find them on eBay or do it your self