Post by
KATwo40 »
https://forums.nicoclub.com/katwo40-u25350.html
Tue Feb 28, 2006 5:45 pm
If the mating flange (5 bolt) that attaches to the downpipe is finely machined, a gasket is not necessary. In fact, it's better to omit the gasket whenever possible to eliminate another possibile leak source. Gasket = weak point. I run with no gasket and have no leaks so far.
Hope this information helps ya out, man. I know you've been incredibly patient in getting your turbo project complete.