Our EGT probe is only .161 inch diameter and 1 inch long and causes no measurable power loss and thus can be used at all times. Installation simply involves drilling a 3/16 inch hole in the header pipe approximately 6 inches from the head and tightening the integral screw type hose clamp. The 44 inch armored cable connects directly to your gauge or to one of our extension cables. This probe fits 1" to 1.75" primaries. For use with Westach EGT gauges, Part No. 1081 and 1082. Sold individually.
We also offer a Clamp-On EGT Probe for 1.62-2.5 Inch Tubes (Part No. 1084).