The foam packing process involves two different chemicals being injected into a bag. When mixed, these chemicals turn to foam and expand. When packing, we place our components into an appropriately sized box and surround them with the bags to support and lock each part into place so that they do not touch and have adequate protection during shipping. The foam offers strong resistance to crushing or puncturing during transit. It’s very important to us that we take every precaution to have your exhaust components arrive in perfect condition.