Silicone Reducing Sleeve 4" ID to 3.8" ID - Gloss Black
This 4 inch to 3.8 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. Fits on most LS1 MAF's.