4" ID to 3.63" ID x 3" Long Silicone Reducing Sleeve, Gloss Black

4" ID to 3-5/8" ID silicone reducing sleeve (coupler), 3" long. Gloss black finish with 4-ply reinforcement for strength. Perfect for air-to-air aftercooler systems and turbocharger connections. Fits on some LS1 MAFs.

Temperature rated at 350°F continuous.

Recommended clamps: 94100-0400 on the small end and 94100-0438 on the big end.