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Although they have a much lower fail rate, supposedly around 1% and its extremely rare to find someone who had it happen. They used the larger dual row bearing in some earlier years too but somewhere in 2005 they again started using the larger dual row bearing thru 2008. Hopefully there's paperwork on the engine replacement showing which year engine was used and maybe even details about the IMS? If not then the IMS may just have to be inspected if you want to know which one is in there. TuneRS motorsports make a Direct Oil Feed system to better lubricate the IMS bearing, stock or upgrade, and it works on any year 97-08.
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