READ UP ON MY POST
http://www.toyotanation.com/forum/t201427.html AND IT SHOULD GIVE U THE ANSWER I FOUND A WAY TO DO IT...THERE SHOULD B A LINK ON THAT POST SENDING YOU TO THE PICTURE GALLERY WHICH HAS A 94 COROLLA WITH A COLD AIR...AND SINCE THE ENGINE BAY OF A 98 ISNT MUCH DIFERENT FROM A 94 YOU CAN DO THE SAME THING. ALL YOU HAVE TO DO IS RELOCATE THE CATCH CAN (PLASTIC) FOR YOUR RADIATOR FLUID....WHICH SHOULD B ON THE LEFT SIDE OF YOUR BATTERY AND MOVE IT BEHIND THE BATTERY...YOUR GONNA NEED SOME TUBING SO U CAN MOVE THE CATCH CAN....AND THEN PEICE THE COLD AIR WITH THOSE KITS IN AUTOZONE OR ADVANCE AUTOPARTS...OR JUST CUSTOMIZE IT YOURSELF WITH PIPES AND WELDING...