I am a 2008 subaru wrx GHE 2.5L owner in Singapore(South East Asia).
Bought my car in January 2009, been on 16k mileage (August 2009) and had same problem , engine knocking so whole engine need re build!
Sad part is , Subaru distributor won't honour as i change to Fujitsubo Legalis r cat-back exhuast, the exhuast is a certified and acceptable under the Traffic authorities in Singapore!
Thus, i have to bear engine rebuild cost on my own!!!
Wonder if u guys have any advise on justifying the engine failure is generic??
Anyone tried contact to FHI directly??