504395 / 504395 - Application Notes Our new STILLEN Exhaust for the Maxima is the best system available. Constructed of 100- percent mandrel bent tubing for optimal flow, and T304 polished stainless steel Tips, End Pipes, and Muffler for long life and a sharp look. The straight through Mufflers are wrapped in exclusive Italian Granite Wool for durability and responsible sound levels. Available as a high-performance Rear Section exhaust only. The end result is increased torque and power with the Full Cat-back System.