Downpipe Bolt size

[kriegular]

Hey all,
i was just wondering if anyone knew what size bolt and thread size i need to get for the downpipe to O2 housing. Mine must have rattled out.
thanks,
mike d.

 

[romeen]

The studs on the O2 sensor housing to which the DP attaches are M12 x 1.25

 

[kriegular]

you're the man, thanks

 

[stock1g4g63]

I know this is a long @ss time ago, but is that the same size bolt that hooks up the downpipe to the catback?

 

[KGB Pilot125]

Should be, I just put on a o2 housing, downpipe, test pipe and exhaust and the downpipe to test pipe were basically the same size as the o2 housing.