Im having an issue with my Megan SS o2 housing and my Buschur downpipe.
Buschur recommends not running the stock donut gasket, but now that I have added the SS 02 housing, Im getting 2 big leaks where it meets the downpipe... Its leaking between the center part of the flange and not by the bolts.

Any fix on this? Do I use a gasket now? The exhaust gases are hitting my radiator now and causing bad readings to my wideband...