Just confirming that I need a special rental caliper tool to twist the caliper in so I can fit new pads is this the correct method?

 

You can get away with a square metal bar of the right size.
Are you sure Gen 5 still uses twist-in pistons? Gen 6 is push-in.

 

This is the rear caliper

 

Yeah, I have the $3 square type. Works just fine.

 

Well I rented this kit from O'Reilly and it kind of fit but it worked! Thanks everybody!

 

no rotor replacement?

 

My bad, I thought that 5 gen would be the same kind of piston as 3d gen had. I wonder if an angle grinder key would work on this piston???

Apparently, where you are things don't rust - they get moldy

 

The rotors were pretty rusty from sitting 2 years in mud. Lol I know it looks like mold it's actually a product by Rust-Oleum that removes rust and creates a white chalky substance when it's working until it's scraped and washed away