GlowShift Exhaust Temperature Bracket Easily Install a 3.5mm EGT Probe to Exhaust Pipe Without Having to Tap into the Pipe Simply Drill 3/16" Hole, Insert the EGT Probe and Clamp it Bracket Size: 2 1/2" - 5 1/2" - Thread Size: m8 x 1.25 Installation Instructions, One Year Warranty & Free Lifetime Technical Support This item may not be compatible with other manufacturer's EGT probes.