Alternator Drive Belt Idler Pulley is a direct fit for the following:

2001-2014 Subaru Legacy
3.0L & 3.6L-H6 Engines
2001-2014 Subaru Outback
3.0L & 3.6L-H6 Engines

2006-2014 Subaru Tribeca
3.0L & 3.6L-H6 Engines

Genuine Subaru Part Number: 23770AA020