1/4 NPT X 6AN W/ 1/8 NPT GAUGE HOLE (FUEL BYPASS FITTING), 1/4 NPT X 6AN W/ 1/8 NPT GAUGE HOLE (FUEL BYPASS FITTING)., Nitrous Express 1/4 NPT X 6AN W/ 1/8, Nitrous,1/4 NPT X 6AN W/ 1/8 NPT GAUGE HOLE (FUEL BYPASS FITTING), 1/4 NPT X 6AN W/ 1/8 NPT GAUGE HOLE (FUEL BYPASS FITTING), 1/4 NPT X 6AN W/ 1/8, Pipe Fitting