The aFe Magnum FORCE 3-1/8 in to 2-3/4 in 90° reducing elbow with port is a reinforced silicone connector that joins those tube sizes and includes a port for PCV hookup. Built with two layers of reinforcement and supplied with corrosion-resistant stainless clamps (#044 & #052), it resists tearing and deformation while allowing expansion and vibration. Not for pressurized or forced-induction sides; common as a spare for aFe intakes.
aFe Magnum FORCE Intake Coupling Kit (3-1/8IN ID to 2-3/4IN ID x 90 Deg) Elbow Coupler w/ Port Black