A Single Row or Double Row IMS
 

Engine Number Model Bearing Type
Up to engine # M 651 12851 Boxster 2.7L M96.22 Double Row Bearing
Up to engine # M 671 11237 Boxster S 3.2L M96.21 Double Row Bearing
Up to engine # M 661 14164 Carrera 996 3.4L Double Row Bearing
From engine # M 651 12852 Boxster 2.7L M96.22 Single Row Bearing
From engine # M 671 11238 Boxster S 3.2L M96.21 Single Row Bearing
From engine # M 661 14165 Carrera 996 3.4L Single Row Bearing
All 2005 Boxster 987 (maybe some 2006 models) Single Row Bearing
All 2005 Carrera 997 (maybe some 2006 models) Single Row Bearing
Maybe some 2006 Cayman models Single Row Bearing

Looks like I have a single row.....with engine number 67407933

Nice, but unfortunately also wrong. All Boxsters up to 1999 are dual rows, 2000-2001 are a total crap shoot and have to be pulled apart to determine which bearing is in them. 2002-2004 are all single rows. 2005 starts another crap shoot year where it can either be a single row, or the oversized non serviceable version. Again, the only way to know is to pull the car apart and look. 2006-2008 are all the non serviceable units.

This list has been published over and over again, but those of us that actually retrofit these cars for a living have seen it be wrong often enough to ignore it.......

Where did you get this information from?

+ many engines have been retrofitted so even IF the list was correct for the OEM fitment at date of manufacture ,it may be wrong now

It has been misleadingly posted on several forums, like Pelican.

I would suspect from this Pelican Technical Article;

Pelican Technical Article: Boxster Intermediate Shaft Bearing Replacement and Upgrade (IMS) - 986 Boxster (1997-04) - 987 Boxster (2005-06)

Correct. According to the engine number and year, we were certain my car was a double row. They pulled the clutch out and found.... hold it.... single row. Double row now tho.

What year Boxster and what was the manufacture month and year of it?