I just joined. Ijust purchaseda '01 S60 T5 in Mistral Green. It is my first Volvo and hopefully it will last a long time. I plan on modifying a few things, any advice would be great. The immediate changes underway are a S60 R spoiler, new tires, new rotors, replace timing belt and more. I was thinking of an OEM exhaust and possibly an intake system.I have done some looking into the ECU, but was wondering what that intailed and if there are any potential drawbacks to it.