lefty loosy... righty tighty... for starters
its a 17mm if that helps
and it is TQ to about 30-40 ft lbs so dont fear gettin on it
there are two 12mm bolts holding the filter+bracket to the firewall, right near the ABS unit and the intake pipe and TB, remove the 12mm AFTER loosening the banjo (17mm) fuel bolt and the 14mm (i think) feed from the tank.
as far as pressure if ur not a total bitch then u can deal with a little fuel spraying when u loosen the banjo bolt. Just let the engine cool a bit thats all, dont do this right after getting off the highway.
any more Q's PM me....
kris