I believe that that particular air box was only used on the 2000CS and possibly on the NK tis. The original 1600/2002ti air box has outlet barrels that are at an angle to the main cylinder and the snorkels were both on top instead of one being on the bottom. Here are some pics. A&B are the 2002ti air boxes, C is from the 1600GT, D is an NK/2000CS and E is the 2002tii version.