4.25" ID to 3.75" ID - Gloss BlackThis 4 1 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 0450 on the big end.
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