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I'm in a running battle with some other guys on another forum over AP J hook fitment.

I've told him he's mounted them backwards. He says he knows but it works better this way and another guy swears that they are in fact mounted correctly.

It would really be something it they worked better this way!

I gave up on looking at the hooks or grooves. I always look at the center veins to confirm orientation.

+1...look @ the direction of the veins

Those pads and rotors won't help at all with those DISGUSTING tires in the background. I hope your not running those with that braking set-up

Forgive my ignorance but in the picture it seems the position of the veins suggests that air is drawn out of the disc rather than in for cooling. Is that the way it should be?

Edited.

This link has information about brakes that suggests the same as the picture that Celsius posted.

"A vented rotor is comprised from two friction discs joined together with a series of vents, veins, or other cooler passages. When these rotors are spun at high speeds they actually force air through the center of the disc effectively cooling the rotor from the inside out"

this is the guy's setup not mine!

The StopTech AeroRotors® are directional. If they are not installed on the proper side of the vehicle, airflow will be restricted and cooling will be severely diminished. The vanes on a rotor act like a centrifugal air fan, drawing air from the inside of the rotor and flowing it to the outside. The vanes of a directional rotor should arch back like arms on a pinwheel. On the top side of the rotor, the vanes should curve toward the back of the car.

Ok good well he clearly is not the sharpest tool in the shed

Yeah, that makes it easier, but you might want to put them on the other way if you spend a lot of time driving in reverse.

Those are installed incorrectly and will not perform as they should.

Take this to the brake section and hopefully AP Chris can add more.

Bish

This diagram is correct and straight from the source. But "Courtesy AP Racing"? I don't think so! Looks like yet another hijack...LOL.

The easiest way to tell if they are mounted correctly is to place a pencil into the vanes at the top of the rotor. If the pencil points to the rear of the car, you've got it right.

Chris

That's how it's supposed to work, yes.

Yes, that is correct.