SLG - Catch Can Exhaust Venturi KitIntroducing Our Upgraded Venturi System Better Than Ever! Don't want to see or smell catch can fumes, but also dont want your engine to suck them back in? Our venturi system is the ultimate solution to a common problem: finding a reliable vacuum source to draw toxic, knock inducing vapors out of your engine system. By leveraging the venturi effect, this fitting creates a vacuum when welded into the exhaust pipeit's simple physics! Features: Male 10AN