Banks Boost Tubes are the largest charge air cooler pipes in the industry! Featuring a full mandrel bent 3.5" diameter compared to competitors’ 3†or the the stock 2.5" crush-bent tubes. Made of high-quality aluminized steel, Banks Boost Tubes allow for a quicker turbo spool by improving boost pressure retention (increasing air density) between turbo, intercooler, and intake resulting in maximum horsepower.Greater cooling capacityImproves airflow by 87% over stockAllow the turbocharger to spool up fasterConstant diameter tubing for the best flowBillet venturi couplers maintain boost pressureCompliments Derringer Tuner, Ram-Air Intake , and Monster ExhaustBung for a temperature probeFlows 680 CFM vs 364 CFM stock5-ply heavy-duty silicone couplersSpring-loaded constant tension clampsMandrel-bent aluminized steel constructionHuge increase in size and flow over stock and competitors (3.5" vs 2.5") Emissions Compliant: 49 State