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  #1  
Old 05-20-2014, 04:15 PM
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Default 129 Exhaust - Thread Size?
Thinking about adding a stack while it's all apart anyway. Can someone let be know that thread size at the engine?
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Old 05-20-2014, 05:41 PM
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1" NPT
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Old 05-20-2014, 06:45 PM
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Thanks. NPT is tapered pipe, yes?
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Old 05-20-2014, 07:33 PM
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National Pipe Thread, yes.
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Old 05-20-2014, 07:35 PM
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Perfect, thanks!
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Old 05-21-2014, 09:33 AM
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You might also need a locknut for ridged conduit.
At least I think that is what IH used.
If your using an elbow in the block versus a nipple then an elbow.
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Old 05-21-2014, 10:26 AM
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Don't know much about stacks but you WILL have to re-enforce the stack with added support. This topic has been talked about before & all stated that.

Nik,
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Old 05-21-2014, 02:35 PM
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Quote:
Originally Posted by DoubleO7 View Post
You might also need a locknut for ridged conduit.
At least I think that is what IH used.
If your using an elbow in the block versus a nipple then an elbow.
Not sure of the layout quite yet... but there is a lock there now. Depends on the rust situation which of those two I'll try.

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Originally Posted by nikster View Post
Don't know much about stacks but you WILL have to re-enforce the stack with added support. This topic has been talked about before & all stated that.

Nik,
Yah, I've seen those discussions here and there, thx. Again, not sure what I'll do but, fortunately, there a million pics out there to help me decide.
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