PERFORMANCE COLD AIR INTAKE SYSTEMS WITH SYNTHAFLOW FILTER Improves airflow up to 20% over stock High-flow reusable 5-layer cotton/durable epoxy-coated wire mesh superior air filter Up to 18 horsepower gains without any other modifications Mandrel-bent large-diameter tubing is powder coated inside and out Synthaflow filters utilize multiple layers of cotton gauze with a layer of synthetic fiber material that traps the smallest dirt particles, plus a durable epoxy-coated wire mesh specially designed to provide optimum balance between maximum air flow, peak filtration, and filter rigidity. Airaid premium filters utilize a hand-poured urethane body that won't crack, curl, or shrink. Easy to install with ordinary hand tools. Also replace truck's restrictive intake tube with improved air flow tubing.