AEM's blow. The bolts that they use are like sub grade 1. My freind had a set, every bolt stripped, so he used an easy out to try and get them out. The POS bolts were so soft that the easy out just tore them apart instead of gripping them.
The skunk2's are alright, just use locktite, check the bolts after you drive on them for a bit (pills_PMD had his sliped because they loosened up) Also, like alot of camgears, the degreeing is a tad off. Where the font may say that it is at -1 degree, it could be at 0 or +1 degree. Bring them to a good shop and have them degreed.