so do all bf turbo's come with the upgraded internals? or is it ONLY the 6/06 onwards? if I bought an 05 model I would be missing out on the stronger motor? seems strange if they did it mid model... is it worth finding 1 with the stronger internals if this is the case? I dnt plan 2 hav huge hp just a flash tune o/s intercooler coi & exhaust...