I cracked my air injection piping and I ass-umed that the bolts for the air injection tubes would be an easy find so I removed them. Does anyone have any idea what size they are? I found this thread on zcar, but the sizes that were listed was much too small.
I tried a 1/4 NPT steel fitting but it was much too small (diameter) to fit. I went to Lowes and the thread pitch seemed to match a 3/8 pipe plug, but it was a touch too wide. If the plug was metric I suspect it would've fit. Anyone have any ideas? I've tried a whole bunch of bolts with no luck. It's for a 260z manifold if that makes any difference. Thanks for any help.