i would highly recommend the thick gasket offered by Concept Z
I had z1 metal gaskets and needed to use a bunch of RTV to seal my leaks. CZP thick gasket and done.

https://conceptzperformance.com/czp-...hr_p_63426.php

 

Back with update been awhile. I went with fast intentions gasket and vibrant gaskets with nord lock washers. No exhaust leaks. I was having a problem there with test pipe bolts coming lose but the nord lock washers fixed it.

Fast intention resonated test pipes with the j bend never got checked engine light with soho Motorsports exhaust.