Those EGTs look like they are 3/16" probes. I'm assuming for responsiveness that you went with exposed tips. How far down in to the tube did you position the tip? Also, there has always been discussion of where to mount them in the tube with respect to the exhaust port. The rule of thumb that I was taught was to be about 6" from the exhaust valve. Depending on how strong the exhaust pulses are, you can have problems with the EGTs vibrating and breaking off. My drag race customers use to go with 1/4" probes and just put the tip of the EGT in to the port. Ideally, you want to be in the center of the tube but the EGT would create to much blockage.