997 Manifold Fitting is 5/16-25″ made from billet aluminum and Hard Anodized Red for a fantastic look and durability. 

They are used primarily on most EC intake manifolds.

Hot Fumes, oil, and fuel, especially methanol, can contaminate your external fuel pump if pulsing off the side cover or valve cover. We prefer to pulse from the intake manifold whenever possible. This method is a cleaner and cooler source for the vacuum signal to extend the life of your external fuel pump.