I bought the Delco 213-198 coolant temperature sensor, and sure enough it was at Oreilly for $23.99. I'm trying to avoid paying the money for Holley branded sensors. This one & the oil pressure sensor. Holley wants $140 for the oil pressure sensor. Reading the EFI forums, guys have also said the Delco D1846A / 12616646 oil pressure sensor for $30 plugs directly into the Sniper wiring harness, and it's a .5 - 4.5 volt sensor, so it's compatible. I can use that $110 somewhere else... BUT, most important... if guys are seeing a discrepancy with the Holley sensors, I want what works, and I will buy that regardless of the cost.