I am not sure if it is my imagination or not, but it seems that as I add mileage to my 98 1.9 the exhaust is sounding a little more throaty with an increase in volumne, I am curious if anyone else has experienced a similar situation? I also have been reading on the message board that some owners have noted an increase in power with the 1.9 as the result of additional mileage up to 25k- is this possible?