It was the pads. He went to advance and bought a set of platinums for the front and the pad knock is gone. I had ultimax 2s on one of my cars that had pad clunk when backing out and then the 1st initial stop going forward. I switched to brembos and the sound was gone. I figured it was a fluke, I’ve ran ebc on my 21 since the oems came off and perfect. Seems like ebc misses the mark on a few models. To much money and pain when you can’t just run up town and return them. He emailed ebc so it’s a waiting game now.