1fast97gsx

I need to know what size the stock threaded holes are in the stock exhaust manifolds on a 93 Z28 where the AIR tubes went. I did the AIR removal and went to a few hardware places to try and find bolts or plugs to close those holes off but they didn't have anything that big. It appears to be 3/4" X unknown thread. Nobody I went to could figure it out or had anything. Compression and pipe thread also didn't work. If someone can give me the size / pitch and a store I can go to get it that would be awesome. Thanks.

Low N Slow

iTrader: (4)

Get M22 metric drain plugs, I got mine at NAPA

1fast97gsx

Thanks! Do you remember what pitch? Thanks!

Chris 96 WS6

iTrader: (1)

Like Low N Slow said, M22 metric plugs. I don't think there is a specific pitch like an SAE, its just M22.

the_merv

iTrader: (88)

I had to plug off mine in the old Headers I had, I used some 5/8 tapered plugs from Lowes.