I ordered most of my internals from a local performance shop, and I'm just doing a sanity check on all the part numbers. The ARP main stud kit I got is number 218-5401, and says "MAZDA MIATA MAIN STUD KIT" on the box. According to ARP's catalog, this is the kit for B-series motors (b6, bp, etc), but they don't have a listing for the FS (or anything else besides the MZR for that matter). Can anyone confirm this is the correct part number? Thanks!