Could someone please confirm the bolt size between DP and 02 housing? Received my DP from UR without any hardware and didn't think the stock spring bolt should be used?

Thanks!

 

I think the stock spring bolts are used in most of the down-pipes for this car...I even used the stock ring gasket, it stayed attached to the o2 sensor housing when I remove the stock down pipe.

 

I also got the UR downpipe and the spring bolt is not used. But I am not sure exactly what size it was. And also, you won't be able to use the donut gasket. You must buy a generic flange gasket and very high temp silicon sealer....