4" (102Mm) Od Straight Aluminum Intercooler Pipe Air Intake Tube, Brushed Finish AC PERFORMANCE Aluminum Alloy Pipe, Straight, OD 4" (102mm), Length: 11.8" (300mm), for Intercooler Pipe, Intake Pipe, and Universal Use Straight, outside diameter: 4" (102mm), length: 11.8" (300mm), wall thickness: 0.078" (2mm) High class surface treatment. Designed to be cut, spliced or welded to fit custom applications. Fit for air intake, cooling systems, turbo intercooler piping setup The precise mandrel-bent aluminum tubing keeps air flow uniform, smooth and free-flowing. Made from high-quality 6061 aluminum alloy, fit for a wide spectrum of custom applications while withstanding high heat and stress.