The 2003–04 Mercury Marauder is a rare performance sedan powered by a 4.6L DOHC V8, delivering a unique blend of muscle car performance and full-size comfort. Upgrading to long tube headers and a performance cat-back exhaust system improves horsepower, torque, throttle response, and gives your Marauder a deeper, more aggressive exhaust tone.
Stainless Works designs premium performance headers and exhaust systems specifically for Mercury Marauder platforms, engineered to maximize exhaust flow while maintaining durability and reliability for street and performance builds.
Stainless Works systems are engineered specifically for the 2003–04 Mercury Marauder and its 4.6L 4-valve platform. Built from corrosion-resistant 304 stainless steel and TIG welded for durability, our headers feature mandrel-bent tubing and high-flow collectors to improve airflow and unlock horsepower gains.
Shop Mercury Marauder performance parts:
Every Stainless Works exhaust system is proudly Made in the USA and backed by a lifetime warranty on materials and craftsmanship.
Do headers increase horsepower on a 2003–04 Mercury Marauder?
Yes. Long tube headers improve exhaust flow and can increase horsepower and torque, especially when paired with a full exhaust system.
What engine does the Mercury Marauder have?
The 2003–04 Marauder features a 4.6L DOHC 4-valve V8 that responds well to performance exhaust upgrades.
What does a cat-back exhaust upgrade do?
Improves airflow, throttle response, and delivers a deeper, more aggressive exhaust sound.
