AP brakes question

[2blackhats]

As a recent owner I'm still getting to know my new car, but I've noticed something. I've got HSV branded AP brakes on mine and the grooves on all the discs as you look at them appear to swirl round in a forwards direction...except the passenger side rear which swirls backwards. Does this matter? Will it explode? Should I be concerned?
I have to say they seem to work fine. Stops lovely, no hint of pull or judder.
Advice please learned ones!

[stevieturbo]

The direction of external grooves is unimportant.

The direction of the internal curved vanes is important.

oddly...manufacturers seem to do external grooves one way...then the other....then back the other way.

[crisisjez]

Simple...... the one`s that swirl to the left were made in the Northern Hemisphere, to the right in the Southern

[caspy]

The fronts were 'handed' the rears are the same either side, whether HSV or AP branded they are the same. AP dont make a left/right specific rear disc.

[stigmundfreud]

what about on the vxr brakes?

[monkfish1]

stigmundfreud said:

what about on the vxr brakes?

Vxr brakes are not handed. Our aftermarket ones are handed but only the grooves on the outside.

[stigmundfreud]

cheers, thought as much but just wanted to make sure