4" ID to 3.75" ID Connector - Gloss Black kinky it's a straightforward process that

it's a straightforward process that even a beginner could figure out

Our product fits the Cat 3406E manifold spacer requirement perfectly

Made with superior quality billet aluminum that is then triple chrome plated and polished to a brilliant shine

Alcohol pad x10

4" ID to 3.75" ID Connector - Gloss Black kinky it's a straightforward process thatThis 4 inch to 3 3 4 inch reducing silicone coupler is 3 inches long. Four ply poly reinforced silicone for strength. Perfect for air to air aftercooler systems and turbocharger supercharger connections. Rated at 350 F continuous. Recommended clamps are 94100 0412 on the small end and 94100 0438 on the big end.