[JFP in PA]

1) Unless it was done by Jake Raby, probably the only way is to take the car apart and look at it. False upgrade claims are a common event in the used car market.

2) Not really, the event is usually quick and catastrophic in nature; very few are "caught" in the act of failing. Signs of a problem manifest themselves in a large amount of metal debris in the oil and filter, but that is usually too late. Early signs can be see in cam deviation values, but that requires diagnostic software.

3) When Jake Raby and LN Engineering introduced the upgrade, they developed a numbering system to identify which car what bearing was in for data tracking. Unfortunately, when installers failed to report back the necessary information, the data base broke down.

4) $1K is not realistic; $2500 to $3000 is more in line as the update usually also includes a clutch and RMS update. With the dual row IMS update part costing $650 alone, you are not going to get one done for $1K.