Boosted Performance single turbo build

Neo187H

Flyboy is correct, that is the factory gasket as per Nissan parts departments. It mounts between the lip of the factory cat and the beveled surface in the stock exhaust manifold and is pressed between the two creating a seal.

Personally I also went through a few of the gaskets Motordyne supplies with their ART pipes until I installed the motordyne gasket WITH the stock factory gasket carefully positioned and tacked up with high temp gasket maker and so far have had zero issues in 3 or 4 months. Compared to the Motordyne gaskets lasting one dyno tuning session on my SCed car.