2001 Nissan Pathfinder Replacement Exhaust Parts - CARiD.com Nissan Pathfinder 2001, Quiet-Flow™ Stainless Steel Aluminized Exhaust Muffler and Pipe Assembly by Walker®. Together with delivering OE-style sound, the Quiet-Flow Muffler features 100% structural stainless steel construction that... Designed for OE equivalent sound and precision fit Spun-locked heads for a proper resistance to backfire