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The good thing, there are 2 air boxes, the stock R7 air box, and a YEC race air box.
Yes, I have the shower injectors, along with 2 types of air snorkels. The only thing missing, are the fuel lines that connect the throttle bodies, to the shower injectors. The connection for those lines, are built into the airbox.
In this picture, the shower injector assembly is setting on top of the throttle bodies.. it’s all one unit