On the stock sensors, they were held in on the cold side charge pipe by 2 screws.

On the gms1 sensors, they are held in by one screw on the cold side and the other screw hole still remains.


Is this an area that could be a boost leak?

 

Not on the stock charge pipe, the hole isn't drilled through. It may leak around the sensor if the fit isn't tight because of a small o-ring or the sensor not sitting flush. There is a small plastic piece that needs to be trimmed off the sensor to get it to sit right.