4" ID to 3.75" ID - Gloss Black 90 Degree Black Rubber Elbow handles 500 F continuous and

handles 500 F continuous and is perfect for intercooler/aftercooler applications

This 45 degree silicone elbow is 4-1/2" ID

This 4 inch to 3-1/4 inch reducing silicone coupler is 3 inches long

and then the 6" intake tube fits into the insert

and then the 4-3/4" intake tube fits inside the insert

4" ID to 3.75" ID - Gloss Black 90 Degree Black Rubber Elbow handles 500 F continuous andThis 4 inch to 3 3 4 inch reducing silicone coupler is 3 inches long. Four ply poly reinforced silicone for strength. Perfect for air to air aftercooler systems and turbocharger supercharger connections. Rated at 350 F continuous. Recommended clamps are 94100 0412 on the small end and 94100 0438 on the big end.