Is this right?

[nip]

I was told yesterday that my front drilled discs are facing the wrong way

that is the pass side is this correct
cheers nip

[Hammu]

It is not possible to tell if a drilled rotor is installed properly, simply by observing the drill pattern. Different manufacturers use different patterns with spiral "arms" that appear to lean in either direction, regardless of the internal cooling fin orientation. For example, StopTech AeroRotors, used on their big brake kits, have a drill pattern that appears to lean to the front of the car. Porsche OEM rotors have a drill pattern that appears to lean to the back of the car. In both cases, the internal cooling fins are properly oriented, leaning backwards. But the drill pattern is opposite. This is why Porsche mechanics often install StopTech big brake kit rotors backwards, despite the big "L" and "R" stickers on the rotors! They're relying on the drill pattern, rather than the direction of the internal cooling vanes.

As with slotted rotors, one must check the direction of the internal cooling vanes in order to determine the proper orientation of drilled rotors.

[nip]

It is not possible to tell if a drilled rotor is installed properly, simply by observing the drill pattern. Different manufacturers use different patterns with spiral "arms" that appear to lean in either direction, regardless of the internal cooling fin orientation. For example, StopTech AeroRotors, used on their big brake kits, have a drill pattern that appears to lean to the front of the car. Porsche OEM rotors have a drill pattern that appears to lean to the back of the car. In both cases, the internal cooling fins are properly oriented, leaning backwards. But the drill pattern is opposite. This is why Porsche mechanics often install StopTech big brake kit rotors backwards, despite the big "L" and "R" stickers on the rotors! They're relying on the drill pattern, rather than the direction of the internal cooling vanes.

As with slotted rotors, one must check the direction of the internal cooling vanes in order to determine the proper orientation of drilled rotors.

Cheers il check them tomorrow btw they are porsche discs

[audi rs2 1995]

I was told yesterday that my front drilled discs are facing the wrong way

that is the pass side is this correct
cheers nip

Not correct, you must turn them around. You can check my fotoalbum.

Cheers Jesper

[AndyP]

Not all drilled discs are handed, AMG use the same drill pattern for LH and RH so does it really make all that much difference?

[willg54]

depends on the venting direction in the discs. just realised i have mine on the other way around from when i got the car, so not too sure which is right actually....but looking at the pics i've got, i think they're meant to be the other way around from what you've got!