Gates Cam Idler Pulley Right Side Subaru WRX / STI 2002-2014
When doing a timing belt replacement it is always a good idea to replace the tensioner(s)/idler pulleys while you are in there. With the Gates Timing Belt Tensioner/idler you can rest assured knowing you purchased a high quality part. Gates makes many OE parts and their aftermarket parts exceed OE specifications.
Ref (A) in picture