Hello to everyone, might be old news already, but I just wanted to throw this out there. If you are ordering stop tech brake pads there can be an issue. I was going through buybreaks dot com and they stated that stoptech did not make pads for the GSL-SE. After calling stoptech to no avail and doing research I found out that the 12a and 13b models use the same front pad, so I had to order the 12a pad. I looked on napa and autozones web sites, and they show that both models do use the same pads on the front.