air injection tubes
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New User
Joined: Nov 2003
Posts: 19
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From: Algona Iowa
air injection tubes
can someone tell me what size threads the air injection tube nuts are that screw into the exhaust ports in the head? i plan on changing the air rake and i want to have a thread chaser just in case. thanks.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
I plugged my holes with 9/16-18 bolts, but it's been said that the holes are a pipe thread. I took my tube to the hardware store to match up plugs and 9/16-18 was the closest I could find in any type of thread. If it's a pipe thread I would guesstimate a 3/8.
