Banks massive 3.5in boost tubes are the largest charge air cooler pipes on the market, flowing 680 CFM and 87% more air than stock! Smooth mandrel-bent tubes deliver more air to your engine while reducing boost pressure loss resulting in quicker turbo spool and more power.Key Features: Huge increase in size and flow over stock and competitors (3.5" vs 2.5"), Billet venturi couplers maintain boost pressure, Mandrel-bent aluminized steel construction, Constant diameter tubing for the best flow, Allow the turbocharger to spool up faster, Spring-loaded constant tension clamps, Improves airflow by 87% over stock, Flows 680 CFM vs 364 CFM stock, 5-ply heavy-duty silicone couplers, Greater cooling capacity