Silicone Reducing Sleeve 4" ID to 3.63" ID - Gloss Black
This 4 inch to 3-5/8 inch reducing silicone coupler is 3 inches long. Four-ply poly reinforced silicone. Perfect for air-to-air aftercooler systems and turbocharger/supercharger connections. Fits on some LS1 MAF's.
Rated at 350 F continuous.