um...I do not know much about your engine...but if someone gave me that part and asked me what the first butterfly is for, I would say it is the choke...but I don't know if chokes even used anymore...
The new V6es have 2 throttle bodies that can be easily identified...
Notice it in the top right hand side...a y pipe comming out of the air box, through the two throttle bodies...then from dual, back to single...
close up
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Don't know, don't care, everyone is entitled to my opinion.
Lowering your car is hazardous to your health -Toyota 4Runner