[flash968]

there is a chemical bonding that happens between the rotor and the pad. when it happens, it goes all the way through the pad. i find it amazing at how many people resist the physics. i saw it all the time at my shop, and continue to see it on boards like this, where so often somebody is trying to do something "on the cheap". it is almost always bad advice. i get that not everybody can afford everything, but there are some things that just should not be done half way.

stoptech is a very reputable company. yes, they sell brake stuff. that does not change the reality. they are not making this stuff up.

used parts are not necessarily "perfectly good parts". i have successfully done pad slaps, but the rate of success is low. it frequently results in pulsing or vibration. in order for rotors to be reused, at a bare minimum, they must be free of deposits, of any "blueing" or hot spots, and absolutely smooth, with no grooves or wear. they should absolutely be surfaced prior to use. if you are going to reuse rotors, you have to use the same compound of pad as before. that means the same brand and model. you cannot mix and match pads. you definitely should not reuse pads.

brakes are the only thing stopping your car. they are not to be messed with. it's just not worth it. it's like the guys who buy cheap tires, and then wonder why they lost traction and hit a tree.

i understand about budgets. everybody is on one to one degree or another. however, if you can't afford to properly maintain a car, then you should park it until you can. been there done that. that's exactly why i don't own a ferrari.

as for the OP and the issue, unless i missed something, we still don't know if he reused the parts or not. if not, then it is more likely that the problem is elsewhere, like the control arm bushings.