"if i might just clarify a little based on model year:
97-99: dual row
00-01: dual row or single row, requires inspection
02-04: single row
05: single row or a non-servicable dual row "larger" bearing requiring disassembly
06-08: non-servicable dual row requires disassembly
09+: no IMS
i can see someone just starting to investigate wondering what happens for model year 01 since the timeline shows 97-00, mid-year 00, after 01"
http://986forum.com/forums/general-discussions/34221-ims-chronology-prospective-buyers.html