The Flowmaster Outlaw Cat-Back Exhaust System delivers the most aggressive sound available for the 2004–2008 Ford F-150 equipped with the 4.6L or 5.4L engine. Designed for drivers who want maximum interior and exterior volume, this system pairs race-inspired acoustics with proven Flowmaster performance.

This high-output system features full stainless steel mandrel-bent 3.00-inch tubing that flows into a compact Super 10 Series muffler. Known as one of Flowmaster’s loudest mufflers, the Super 10 produces a deep, harsh, and unmistakably aggressive tone. Exhaust exits through dual 3.00-inch stainless steel tailpipes and is finished with large 4.00-inch black ceramic-coated double-wall tips, offering both durability and premium styling.

The bolt-on design utilizes factory hanger locations for straightforward installation at home. This emissions-legal system fits all wheelbases for both 2WD and 4WD models and includes all necessary hardware. Backed by Flowmaster’s Lifetime Limited Warranty, the Outlaw system delivers performance, sound, and long-term durability.

Features

• Super aggressive exhaust tone with maximum interior and exterior volume

• Super 10 Series performance muffler for deep, high-output sound

• Mandrel-bent 3.00-inch stainless steel tubing for improved flow

• Large 4.00-inch black ceramic-coated double-wall stainless tips

• Uses factory hanger locations for easy installation

• Stainless steel construction for long-lasting durability

• Includes all required clamps and hardware

• Lifetime Limited Warranty

Specifications

• Exhaust Series: Outlaw

• Type: Cat-Back

• Material: Stainless Steel (tubing & tips), 409 stainless muffler

• Sound Level: Aggressive

• Main Pipe Diameter: 3.00 in

• Inlet Diameter: 3.00 in

• Tailpipe Diameter: 3.00 in

• Tip Diameter: 4.00 in

• Tip Length: 13.00 in

• Tip Finish: Black Ceramic Coated

• Muffler Series: Super 10 Series

• Muffler Type: Reflection

• Muffler Body Length: 6.50 in

• Muffler Body Height: 4.00 in

• Muffler Body Width: 9.50 in

• Exit Style: Dual Out Rear / Dual Out Side

• Clamps Included: Yes

• Hangers Included: Yes

• CARB Compliant: Yes

Fitment

Fits 2004–2008 Ford F-150
Fits models equipped with 4.6L engine
Fits models equipped with 5.4L engine
Fits trucks with all wheelbases
Fits 2WD models
Fits 4WD models
Fits trucks with factory exhaust routing compatible with dual out rear or dual out side exits

For F-150 owners seeking extreme sound, rugged construction, and bolt-on performance, the Flowmaster Outlaw system is the ultimate exhaust upgrade.