I've just purchased a twin air filter for my 08 wr450 and on the packet it says it's for models 03/. I asked the shop attendant if the filter for the 03 model was the same as the 07/08 model and he didn't seem sure and said he would check. I don't trust him and want to check with you guys. Does this sound right? Is the 03 model filter the same as the 07/08? thanks.