Finally there is a good solution for measuring cylinder head temperature on dry or solid heads. We couldn't get anyone to make these for us so we made our own! Right here in house. Screw this brass sensor into an unused accessory hole on the end of head !!!Caution!!! The sensor should be finger tightened only, stem is hollow 5 lb-ft torque MAX. Apply a small dab of RTV near hex base if you want to provide additional security. DO NOT OVER TIGHTEN. Standard GM coolant scaling means an easy dropdown setup for most ECUs on the market however we do provide a scaling chart if needed. It also features the standard 2-wire GM Packard connector. The mating connector is available as an add on when you order. Fahrenheit Ohms 0 25,580 14 16,321 23 12,413 32 9,516 41 7,354 50 5,728 59 4,496 68 3,555 77 2,830 86 2,268 95 1,828 104 1,483 113 1,120 122 992 131 819 140 679 149 566 158 475 167 400 176 338 185 287 194 249 203 210 212 180 221 156 230 135 239 117 248 102 257 89 266 78 275 69 280 61 293 54 302 48