Hi, I am trying to install a 3" buschur dp with a megan o2 housing.the factory donut gasket won't fit.do i need a different gasket for this or just bolt it without a gasket? help!!

 

Technically it's made so that there is no gasket to be used. Although, what I did was use silicone gasket maker, (orange goop) along with a standard 3" 2-bolt gasket because when I had installed it per directions (without a gasket) I had a premature exhaust leak b/w the downpipe and the stock 02.

 

thank you. really helped.