4" ID to 3.5" ID - Matte Red - Aramid 500 DegreeThis 4" ID to 3 1 2" ID silicone reducing coupler is 3 inches long and has the special matte red finish indicating aramid reinforcement. Perfect for air to air aftercooler systems and turbocharger connections. Special tight weave aramid reinforcement handles more pressure and lasts longer than other brands. Rated at 500 F continuous. Recommended clamps are 94100 0388 on the small end and 94100 0438 on the big end.
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