As is the case with many pieces on the third-gen, the stock arms are mounted with metric bolts. Unfortunately, there is no metric steel tubing available, so the BMR A-arms are built with 1/2-inch mounting holes, leaving what we felt was a bit of excessive clearance when mounted using the metric bolts. We chose to drill out the frame and replace the metric bolts with 1/2-inch Grade 8 bolts. The folks at BMR assured us this wasn't necessary. We believe them, but wanted to go the extra step for our own piece of mind.