What can I use to plug the holes in the stock exhaust manifolds?

 

Do a search on "Block Off Plates". I'm quite sure you will find an answer. Also, post your question on Camaro Z28.com if you don't find out on this forum, but I'm sure you will find your answer in this forum.

 

Kelly ,find some threaded pipe plugs from a hardware store ,usually have a square head on em' to be tightened with an adjustable wrench,Also ebay is your best source for so much as you begin your install/modding. look for egr block offs,pumps,...alll kinds of stuff there . ~Michael~

 

just did bolts in mine and had them welded

 

Try an M22 oil drain plug

 

OBDI cars use an M22 plug, OBDII cars use an M18 plug.

 

drain plugs ftw!! Dude!!!! Lol

 

Is this rule absolute? My motor was thought to be 1997, but the M18 was too tiny.

 

Hopefully I don't have it backwards. Try the M22.

 

Oh my.