I just installed rinehart slimline duals and am using the larger O2 sensors near the top of the headers....looking for the size I need to plug the smaller ones near the slip ons? Anyone know what size I need?

 

They can probably help you in the exhaust section of the technical forums.

 

Thanks...didn't think of that!

 

You need 12mm bungs to plug the lower O2 sensor ports.

 

The small O2 bungs are 12mm. I don't know which fuel management system you are using, but some require the factory narrow band sensors to remain installed. My Power Vision does.

 

Mixter, I was just being a wisea$$!

 

12mm - 12mm x 1.25"
18mm - 18mm x 1.50"

 

I bought them at Lowes (if you have them where you live)...I bought the hex head bolts that were I think 12mm x 1.25 mm....and cut them off to the right length..paid about a buck a piece...not as pretty as the allen head ones at amazon, but no ones really sees them anyway...oh and install them with neverseize, just incase you ever need to remove them...

 

2010+ models use 12mm ports. The 09 and older use 18mm ports. If planning to use an autotune or some other device that uses 18mm O2 sensors, 2010+ owners can use 09 pipes as the only difference is the sensor ports.

 

I'm using a power vision.