4.25" ID to 4" ID coupler - Gloss BlackThis 4 1 4 inch to 4 inch reducing silicone coupler is 3 inches long. Rated at 350 F continuous. Four ply poly reinforced silicone for strength. Perfect for air to air aftercooler systems and turbocharger supercharger connections. The 4 1 4" end fits on 4. 15" through 4. 25" MAFs and throttle bodies, including the FAST 102. Also many lids. Recommended clamps are 94100 0438 on the small end and 94100 0475 on the big end.
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