17385 This Flowmaster Force II® cat-back exhaust system is custom designed for 1998-2002 Ford Expedition/Lincoln Navigator with 4.6L or 5.4L engine and is perfect for the person looking for a mild to moderate sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. This bolt-on emissions-legal system features a 2.50-inch mandrel-bent aluminized steel inlet pipe flowing into a 70 Series Big Block II™ muffler for a deep mellow tone. The single 3.00-inch mandrel-bent aluminized steel tailpipe is finished off with a large 3.50-inch polished stainless steel tip and uses the factory hanger locations. The exhaust system is covered by our 3-year Limited Warranty and includes all necessary parts and hardware for a quick and easy installation you can do at home. Notes: Fits 2/4 wheel drive models Features: Includes Hangers and Hardware for an Easy Installation Mandrel-bent 16 Gauge Aluminized Steel Tubing Mild to Moderate Sound Exterior Exhaust Tone 70 Series Big Block II Performance Muffler 3.50-inch Polished 304 Stainless Steel Tip Dyno-tuned for Maximum Performance Uses the Factory Hanger Locations Quick and Easy Installation Flowmaster Quality About Flowmaster Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound. SPECS 2WD/4WD 2WD/4WD Brand Flowmaster Clearance Category Exhaust Emission Code 5 Exhaust Series Force II Exit Position Single Side Exit Heat Shield No Inlet Diameter (in) 2.5 Material Aluminized Steel Muffler Part Number 53070 Muffler Quantity 1 Muffler Series 70 Series Outlet Diameter (in) 3 Product Type Exhaust System Single Dual Single Sound Level Mild System Type Cat-back Tip Diameter (in) 3.5 Tip Quantity 1 Tubing Diameter (in) 3 UPC 700042019694 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 17385 EMISSIONS 5 This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations. TECH RESOURCES Instructions for Part# 17385 Warranty for Part# 17385 Fits 1998-2002 Ford Expedition/Lincoln Navigator with 4.6L or 5.4L engine. Fits 2 & 4 wheel drive models.