Our River Raider Expedition Snorkel System for the JL Wrangler is a clean and simple install. Only one 3" hole needs to be cut through the removable plastic cowl panel. The Snorkel System exceeds the required CFM requirements. It also comes complete with the highest quality stainless steel hardware and includes a rechargeable performance air filter. The optional 18-inch extension is able to be cut to your desired length.