While riding today, I dropped my bike on a bunch of rocks and really messed up my Header pipe. I searched and learned some ways to fix it but there are so many creases on I dont think it can be fixed. I found a good condition 2003 YZ450F header for $50 Does anybody here know if a 2003 YZ450F header will fit a 1999 YZ400F??? Thanks for your input!!!!!! Patrick M.