Haha my bad for not mentioning that its a JDM. About the Cat sensor light though.. It's on even when I just start the car ( and its -25 Celsius outside right now). Couldn't it mean the cat needs to be replaced? I've read cats are first thing to go on subaru's, also when my old engine spun a bearing there were immense amounts of smoke pouring from my exhaust for a good twenty minutes so I wonder if that could have clogged it up.