When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
i have glowshift in my truck n i've never had any problems with them. i believe my thermocouple was 1/8" npt. you can search the internet and find the size hole you need to drill for each tap, n some tap n dye sets have it right on the case