Seller notes

M16x1.5 mm with crush washer. Goes on side of GM block. Comes with 1/4 or 1/8 npt thread pitch for gauge or sensor etc. See correct listing for which version you are ordering.  anodized finish  If you have any questions feel free to text me. Fasster (actually ebay requires that you send me a message through their email system) Usually pretty quick to answers any questions, so please don't hesitate to ask...:-) We supply full systems to the home builder as well as custom shops across the countr...

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