The aFe Magnum FORCE 4 in to 4-1/4 in 90° reducing elbow is a heavily reinforced silicone connector with four layers of polyester reinforcement for added durability and resistance to deformation. It includes a built-in fitting for PCV connection and two corrosion-resistant stainless steel clamps (#064 & #072) for secure sealing. Recommended for non-pressurized use; its robust construction makes it suitable for demanding cold air intake installations.
aFe Magnum FORCE Intake Coupling Kit (4 IN ID to 4-1/4 IN ID x 90 Deg.) Elbow Coupler - Black