Snorkel (37640) 2000-2006 Jeep Wrangler TJ 4.0L L6, 2004-2006 Wrangler LJ 4.0L L6 [OBSOLETE]Description Vehicle Fitment & Emissions Installation Instructions The Periscoop uses Volants sealed air filter box and high velocity air intake tube. The air filter box lid also incorporates a hood seal adaptor that funnels air from a hood mounted snorkel which extends up the passenger side of the vehicle to the roof line. The snorkel scoop uses a polished aluminum front cover that looks great, and prevents larger debris from entering into the air