The gauge sender is the one in the head. Debates can be had over the accuracy of monitoring heat temp vs in the intake but given the stock gauge being known for margial accuracy in the first place I wouldn't harp over where it is as long as it is somewhat inline with the fitech value. After you fix that sensor though.Yeah I thought bout it more on way home from work and realized how important accurate temp is for the efi. I already got one in my amazon cart. I guess I was still thinking h about it more for the gauge not the actual efi