In you look on the Ronayers microfiche the part#s for each caliper are #8. They are different part #s. To the best of my memory the calipers are identical EXCEPT the fact that the holes for the brake lines and bleeder screws are swapped.

 

I also remember an R6 rear caliper (it's been a long time I'd have to look up the years) was a direct swap the RC51 guys used to do as it was .000001 grams lighter than the original one.

 

So would this make a difference that they're swapped?
I'd think that the lines can be rerouted to make them work as the bleeder screw.

I'm doing an axle swap on my car to convert drum brakes to discs.
The calipers are from a Kia Rio and identical as the Accent calipers with the exception of the banjo bolt is swapped from too to bottom.
Since I've got Rio stainless lines for the front and rear of my Accent it shouldn't be a problem for the rear disc fitment.
Accent and Rio are fraternal twins with most parts swappable.

I guess this would be simar to the Rc51 and SupeeHawk with minor variations.
So would it be beneficial to swap to the RC51 calipers for the rear or not. 🤔🤨🧐

 

I guess just imagine hooking up your stock rear brake line to where the bleeder screw is. That's where it connects on the RC51 caliper. If you're using the stock line will it be long enough? Also don't know if you'll end up with any goofy angles (sorry I'm a little OCD) with regards to the brake line. If you're using an aftermarket brake line I'd measure and remeasure and in addition to the length you want they can custom make the bends on the ends to whatever angle you like so again everything fits perfect.

My question to the original poster is why bother? I'm assuming you need a stock caliper and have an RC51 caliper? I can check in the garage next time I'm up on the ladder. I know you're in Australia but if I have a spare Superhawk rear caliper you can have it for the postage to save you the trouble.