Use this exhaust system when you want to upgrade your Ford F - 150's look and performance. It's perfect for Ford F - 150 owners in dry climates who care about style and power. The system has a 4.5 - inch outer diameter on the tips and a 3 - inch black - coated design with dual outlets. It's made of heavy - gauge aluminized steel tubing, which is great for resisting damage under your vehicle.