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. For use with Single EGT Gauge, Part No. 1081 and Dual EGT Gauge, Part No. 1082.
Hint: A thin metal shim between the hose clamp and the header tube will allow this probe to fit 1.5" diameter tubes. We also offer a Clamp-On EGT Probe for 1 to 1.75 Inch Tubes (Part No. 1080).