What is the TQ setting for the four bolts holding the inlet plenum to the SC? I have seen two sets of numbers 6-9 ft/lbs and 15-22 ft/lbs. Also the bolts are 8mm x1.25 correct? Need to retap one of the holes. I was talking to a neighbor as I was installing the plenum and I heard snap and it wasn't the TQ wrench. SH%*!