2003 Ford Mustang Exhaust System Kits

Your 2003 Ford Mustang might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Exhaust System Kits you desperately need.

We currently carry 6 Exhaust System Kits to choose from for your 2003 Ford Mustang, and our inventory prices range from as little as $637.99 up to $1,199.99.

On top of low prices, Advance Auto Parts offers 2 different trusted brands of Exhaust System Kits for the 2003 Ford Mustang. We only sell parts from trusted brands like Magnaflow so that you can find quality parts you can count on.

Don’t take our word for it – check out customer ratings and reviews to buy with confidence. We have 6 reviews on our Exhaust System Kits for the 2003 Ford Mustang from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Exhaust System Kits stock in-person!

Exhaust System Kits for Your 2003 Ford Mustang

MagnaFlow – Competition Series Cat-Back Performance Exhaust System (Part No.15673)

Competition Series Cat-Back Performance Exhaust System

from

$863.99
The MagnaFlow 1999-2004 Ford Mustang Competition Series Cat-Back Performance Exhaust System 15673 brings an aggressive, attention-grabbing edge to the deep resonant exhaust note we’re so well known for. This exhaust kit is designed to enhance your 4.6L 1999-2004 Ford Mustang with dyno-proven performance made possible thanks to fast-flowing mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear exit with 3.5in. Polished Clamp-On Single Wall Angle Cut Cut Edge tips featuring a sporty finish. The exhaust system’s cat-back layout replaces your ride’s exhaust system from near the catalytic converter on back. Exhaust system 15673 is engineered to make your vehicle’s engine produce Aggressive exterior and Moderate interior sound levels, befitting its competition-oriented design. 15673’s direct-fit design makes installation a breeze thanks to the use of advanced 3D scanning techniques. This performance exhaust system is made of 100% durable and corrosion-resistant stainless steel and produced using CNC precision robotic manufacturing, all backed by MagnaFlow’s limited lifetime warranty. Please check to ensure compliance with local noise regulations.

Product Features:
  • Crafted from 409 stainless steel with all mandrel-bent tubing
  • Increased horsepower and torque
  • Aggressive exterior sound
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MagnaFlow – Street Series Cat-Back Performance Exhaust System (Part No.15671)

Street Series Cat-Back Performance Exhaust System

from

$863.99
The MagnaFlow 1999-2004 Ford Mustang Street Series Cat-Back Performance Exhaust System brings out the personality of your 4.6L 1999-2004 Ford Mustang with our signature resonant, powerful engine tone and dyno-proven performance. Thanks to its fast-flowing, mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear exit with 3.5in. Polished Clamp-On Single Wall Angle Cut Cut Edge tips, this Ford Mustang exhaust kit has the performance chops to match its sporty sound and appearance. Upgrade your ride to the next level with an exhaust that has the pipes to put other Ford Mustang’s to shame. With this system your vehicle will be producing Moderate exterior and Mild interior sound levels while leaving other cars and trucks feeling envious at every stoplight. Exhaust kit 15671 features a cat-back layout that replaces your ride’s stock exhaust components from near the catalytic converter on back. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 15671 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow’s 1-year limited finish warranty and limited lifetime construction warranty.

Product Features:
  • Dyno-proven performance
  • Durable corrosion-resistant stainless steel construction
  • CNC precision robotic manufacturing techniques
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MagnaFlow – Competition Series Cat-Back Performance Exhaust System (Part No.16394)

Competition Series Cat-Back Performance Exhaust System

from

$1003.99
The MagnaFlow 1999-2004 Ford Mustang Competition Series Cat-Back Performance Exhaust System 16394 brings an aggressive, attention-grabbing edge to the deep resonant exhaust note we’re so well known for. This exhaust kit is designed to enhance your 4.6L 1999-2004 Ford Mustang with dyno-proven performance made possible thanks to fast-flowing mandrel bent 3in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear exit with 3in. Polished Clamp-On Single Wall Angle Cut Cut Edge tips featuring a sporty finish. The exhaust system’s cat-back layout replaces your ride’s exhaust system from near the catalytic converter on back. Exhaust system 16394 is engineered to make your vehicle’s engine produce Aggressive exterior and Moderate interior sound levels, befitting its competition-oriented design. 16394’s direct-fit design makes installation a breeze thanks to the use of advanced 3D scanning techniques. This performance exhaust system is made of 100% durable and corrosion-resistant stainless steel and produced using CNC precision robotic manufacturing, all backed by MagnaFlow’s limited lifetime warranty. Please check to ensure compliance with local noise regulations.

Product Features:
  • Crafted from 409 stainless steel with all mandrel-bent tubing
  • Increased horsepower and torque
  • Aggressive exterior sound
See More

Borla Performance Exhaust – T-304 Ss, 2.5"Pipe Dia, Dual Exhaust With Dual Exit, 4"Dia X 12" L Round (Part No.140458)

T-304 Ss, 2.5"Pipe Dia, Dual Exhaust With Dual Exit, 4"Dia X 12" L Round

from

$1199.99
With over 400 internal muffler designs based on the technologies shown here, BORLA(R) offers exhaust systems to suit every vehicle, driving style and sound preference. Muffler body shapes, internal core characteristics, flow dynamics and more are tuned and harmonized to maximize performance and pure driving excitement. BORLA(R) ATAK(R) (Acoustically-Tuned Applied Kinetics) technology is designed for high-performance purists who prefer exhaust sound over their stereos. ATAK(R)-equipped exhaust systems deliver the highest available Decibel levels in the BORLA(R) street-legal lineup. And unlike inferior brands that lose significant sound quality at higher volumes, ATAK(R) is tuned like a graphic equalizer to shape and focus sound waves for optimum high-volume output. ATAK(R) technology is based on specifically-tuned attributes of the internal muffler cores, which are calibrated on a vehicle-by vehicle basis to deliver the most desirable sound.

Product Features:
  • ATAK(R) (Acoustically-Tuned Applied Kinetics) Technology Is Designed For High-Performance
  • ATAK(R) Equipped Exhaust Systems Deliver The Highest Available Decibel Levels
  • ATAK(R) Is Tuned Like A Graphic Equalizer To Shape And Focus Sound Waves For Optimum High-Volume Output
  • ATAK(R) Technology Is Based On Specifically-Tuned Attributes Of The Internal Muffler Cores
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Borla Performance Exhaust – T-304 Ss, 2.5"Pipe Dia, Dual Exhaust With Dual Exit, 4"Dia X 12" L Round (Part No.140067)

T-304 Ss, 2.5"Pipe Dia, Dual Exhaust With Dual Exit, 4"Dia X 12" L Round

from

$1071.99
BORLA(R) experience and advance engineering have produced a S- Type exhaust with outstanding flow numbers that generate great power enhancements. These attributes, coupled with an aggressive sound of power and awesome big tip, proclaim this Stang is all business.

Product Features:
  • BORLA(R) Cat-Back(TM) Exhausts Feature, Straight Through And Multi-Core Technology To Unleash Hidden Horsepower
  • Each System Is Built From Aircraft Grade High Quality T-304 Stainless Steel
  • Ultra Smooth Mandrel Bends Ensure Maximum Flow And Power
  • Precision Computer Controlled CNC Manufacturing Ensures An Accurate Fit
  • Free-Flow Exhaust Utilizes Patented Award And Race Winning Technology To Deliver Quality, Sound, Performance Gains And Enhanced Fuel Economy
  • Easy Bolt-On Installation
  • Aggressive S-Type Sound Under Acceleration, No Drone At Highway Speeds
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MagnaFlow – Competition Series Cat-Back Performance Exhaust System (Part No.17118)

Competition Series Cat-Back Performance Exhaust System

from

$637.99
The MagnaFlow 1986-2004 Ford Mustang Competition Series Cat-Back Performance Exhaust System 17118 brings an aggressive, attention-grabbing edge to the deep resonant exhaust note we’re so well known for. This exhaust kit is designed to enhance your 4.6L, 5.0L, 5.8L 1986-2004 Ford Mustang with dyno-proven performance made possible thanks to fast-flowing mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Turndown In Front Of Rear Tire exit with 2.75in. Polished Clamp-On Single Wall Turndown Cut Edge tips featuring a sporty finish. The exhaust system’s cat-back layout replaces your ride’s exhaust system from near the catalytic converter on back. Exhaust system 17118 is engineered to make your vehicle’s engine produce Aggressive exterior and Moderate interior sound levels, befitting its competition-oriented design. 17118’s direct-fit design makes installation a breeze thanks to the use of advanced 3D scanning techniques. This performance exhaust system is made of 100% durable and corrosion-resistant stainless steel and produced using CNC precision robotic manufacturing, all backed by MagnaFlow’s limited lifetime warranty. Please check to ensure compliance with local noise regulations.

Product Features:
  • Crafted from 409 stainless steel with all mandrel-bent tubing
  • Increased horsepower and torque
  • Aggressive exterior sound
See More

FAQs for 2003 Ford Mustang Exhaust System Kits

What are the most popular Exhaust System Kits for the 2003 Ford Mustang?

With 2 brands you can trust, our most popular Exhaust System Kits for the 2003 Ford Mustang parts are:
Competition Series Cat-Back Performance Exhaust System
from $1003.99
This product is not rated
Competition Series Cat-Back Performance Exhaust System
Exhaust System Kits
Competition Series Cat-Back Performance Exhaust System
from $863.99
(1)
Competition Series Cat-Back Performance Exhaust System
Exhaust System Kits
Competition Series Cat-Back Performance Exhaust System
from $637.99
This product is not rated
Competition Series Cat-Back Performance Exhaust System
Exhaust System Kits