I have an 05 WRX wagon. The only mods are intercooler hoses, the elbow in the inner fender that get rid of the baffle, and a K&N filter in the oem airbox. My car has just over 120,000 and the motor has gone bad. I change the oil and use Mobile One full synthetic. I have also changed the oil in the trans and rear. I'm not posting this to rag on the car. I still love the thing. I am just very disapointed that the motor has gone bad with this low millage. My wife and I bought the car new because we thought they where reliable. I will be taking the motor out of the car this Friday to see what came apart. I'll keep you posted. What is the best option for a new motor? Used, rebuild my motor, referb. Thanks.