Home/Custom Intake Couplers Silicone coupler 4.0", 3" long $11.99 Silicone Hose coupler, 3.5" - 90 degree $20.43 Silicone coupler 3.5", 3" long $10.96 Silicone coupler, 3.5" -3.0" reducer, 3" long $20.41 Silicone coupler 3.5" - 3.25" reducer, 3" long $20.54 Silicone coupler 4.0" - 3.5" reducer, 3" long $23.14 Silicone Hose coupler, 4.0" - 90 degree $29.05 Silicone Coupler 4" - 3.5", 90 degree $39.99