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Discussion Starter · #1 · (Edited)
I am trying to bolt up the OBX downpipe to the resonator. The stock spring/bolts from the cat do not screw into the new OBX downpipe bolts. Did anyone else have this problem? What bolts did you use to make this work? What is the size/thread pitch of the two bolts circled in yellow in the pic below?
 

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Discussion Starter · #2 ·
Still need some help.

The stock bolts that connect the resonator to the cat or OBX downpipe is a M10 x 1.25. The OBX downpipe bolt pattern/size are clearly not the same as stock. Does anyone know if there is a bolt size difference between the 2007-2009 versa and the 2010-2012. The OBX header I purchased was for a 2007-2009 versa. I am assuming the bolts should be the same.
 

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Who knows, though they may have changed the bolts mid year, they always do stupid shit like that. Are you sure it's not just the tip threads having crud or rust that is causing them to not thread in. Not sure where you're at, but up North here once a winter has passed, you can't ever re-use exhaust bolts because they're already too rusty.
 

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Discussion Starter · #4 ·
Who knows, though they may have changed the bolts mid year, they always do stupid shit like that. Are you sure it's not just the tip threads having crud or rust that is causing them to not thread in. Not sure where you're at, but up North here once a winter has passed, you can't ever re-use exhaust bolts because they're already too rusty.
I live in Florida, but the rust or crud was not a problem in this case.

I purchased a set of 3/8-16 bolts and they fit right into the resonator to downpipe connection. This is a completely different size than the stock spring/bolt configuration (M10x1.25). I found out after I had already installed the down pipe to the header that the two bolts I used were supposed to be used on the resonator to downpipe connection. I jacked up the threads pretty good on one of the holes, so I went to Harbor Freight and purchased an SAE Tap and Die kit to clean up the threads.
 
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