1999 Ford Mustang Performance Exhaust Products

The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

Flowmaster’s Super 44 muffler uses the same Delta Flow technology found in our larger Super 40 mufflers. The Super 44 delivers a rich powerful tone and are the most aggressive, highest performing street muffler we’ve ever built in a four inch case. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.

DynoMax Ultra Flo Welded performance stainless steel mufflers feature 100-percent welded construction for lifelong durability. The unrestricted, straight-through design dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower. Each muffler uses our exclusive Continuous Roving Fiberglass (CRF) Technology to absorb unwanted interior resonance while maintaining a deep performance tone.

Product Features:

• Stainless steel construction for lifelong protection
• 100% welded design for maximum durability
• Straight through design ensures unrestricted exhaust flow and reduces back pressure
• CRF Technology absorbs unwanted interior resonance while maintaining a deep performance tone
• Dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower.

The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.

Flowmaster’s Super 44 muffler uses the same Delta Flow technology found in our larger Super 40 mufflers. The Super 44 delivers a rich powerful tone and are the most aggressive, highest performing street muffler we’ve ever built in a four inch case. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.

dBX series mufflers – this Laminar Flow internal configuration muffler features the revolutionary HP core design delivering excellent sound control for a wide variety of engine types where vehicle under-chassis space is limited. Utilizing cool shell technology to minimize radiant heat from the muffler body, they are perfect for sport compact imports as well as muscle cars and other performance applications. Constructed with 409S stainless steel internal components and wrapped with a proprietary insulation material and finally a polishable 304 stainless steel casing, these mufflers are as attractive as they are functional delivering a moderate to aggressive tone.

Flowmaster’s Super 44 muffler uses the same Delta Flow technology found in our larger Super 40 mufflers. The Super 44 delivers a powerful rich tone and is the most aggressive, deepest sounding, highest performing four-inch case street muffler we’ve ever built! Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.

DynoMax Ultra Flo Welded performance stainless steel mufflers feature 100-percent welded construction for lifelong durability. The unrestricted, straight-through design dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower. Each muffler

Product Features:

• Stainless steel construction for lifelong protection
• 100% welded design for maximum durability
• Straight through design ensures unrestricted exhaust flow and reduces back pressure
• CRF Technology absorbs unwanted interior resonance while maintaining a deep performance tone
• Dyno proven to flow up to 2,000 SCFM and support up to 2,000 horsepower.

Made from quality materials for durability, DynoMax® pipe is manufactured with precision benders and fixture checked to ensure a precise fit for quick and easy installation.

Product Features:

• IMPROVED FLOW CAPACITY — Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power
• DESIGNED TO PERFORM — Fixture checked to ensure a precise fit for quick and easy installation
• AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
• PREMIUM MATERIALS – Made from stainless steel for durability and long life
• BETTER TOGETHER — Use premium DynoMax® accessories when installing DynoMax mufflers and exhaust systems for a complete performance exhaust system upgrade

Product Features:

• Aluminized Tubing
• Mustang Enthusiasts Only
• OEM Hangers
• Large 2-12in. Diameter Tubing
• Designed For Drag Racing

Made from quality materials for durability, DynoMax® direct fit X-pipe is manufactured with precision benders and fixture checked to ensure a precise fit for quick and easy installation.

Product Features:

• IMPROVED FLOW CAPACITY — Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power
• DESIGNED TO PERFORM — Fixture checked to ensure a precise fit for quick and easy installation
• AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
• PREMIUM MATERIALS – Made from stainless steel for durability and long life
• BUILD IT YOURSELF — Design and custom fabricate your own exhaust system with DynoMax® pipe
• BETTER TOGETHER — Use premium DynoMax® accessories when installing DynoMax mufflers and exhaust systems for a complete performance exhaust system upgrade

Made from quality materials for durability, DynoMax pipe is manufactured with precision benders and fixture checked to ensure a precise fit for quick and easy installation.

Product Features:

• IMPROVED FLOW CAPACITY – Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power
• DESIGNED TO PERFORM – Fixture checked to ensure a precise fit for quick and easy installation
• AVAILABLE IN DIFFERENT SIZES – Offered in a variety of styles and sizes for a quality vehicle repair
• PREMIUM MATERIALS – Made from stainless steel for durability and long life
• BETTER TOGETHER – Use premium DynoMax accessories when installing DynoMax mufflers and exhaust systems for a complete performance exhaust system upgrade

Made from quality materials for durability, DynoMax pipe is manufactured with precision benders and fixture checked to ensure a precise fit for quick and easy installation.

Product Features:

• IMPROVED FLOW CAPACITY – Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power
• DESIGNED TO PERFORM – Fixture checked to ensure a precise fit for quick and easy installation
• AVAILABLE IN DIFFERENT SIZES – Offered in a variety of styles and sizes for a quality vehicle repair
• PREMIUM MATERIALS – Made from stainless steel for durability and long life
• BETTER TOGETHER – Use premium DynoMax accessories when installing DynoMax mufflers and exhaust systems for a complete performance exhaust system upgrade

Standard Header X-Pipe

Made from quality materials for durability, DynoMax® pipe is manufactured with precision benders and fixture checked to ensure a precise fit for quick and easy installation.

Product Features:

• IMPROVED FLOW CAPACITY — Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power
• DESIGNED TO PERFORM — Fixture checked to ensure a precise fit for quick and easy installation
• AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
• PREMIUM MATERIALS – Made from stainless steel for durability and long life
• BETTER TOGETHER — Use premium DynoMax® accessories when installing DynoMax mufflers and exhaust systems for a complete performance exhaust system upgrade

Flowmaster’s race-oriented American Thunder Cat-back system is designed to mount behind the factory catalytic converters, or most OEM style aftermarket H-pipes. These systems are mandrel bent for maximum performance and include Super 44 series mufflers. This American Thunder system delivers a super aggressive interior and exterior tone and is suited to the enthusiast who wants the most aggressive components they can purchase. Like all Flowmaster systems, the benefits include improved throttle response and power. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Product Features:

• Fits with most modified suspensions
• Stainless steel construction
• Patented Delta Flow technology
• Lifetime limited warranty
• Made in the USA

Wake up the performance and sound hidden in your V6-powered 2011 to 2013 Mustang with a Flowmaster Force II exhaust system. These moderate sounding systems retain the dual exhaust system outlets and are designed to replace the original rear mounted mufflers using factory hangers and connections. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially tuned mufflers. As a Force II system, it delivers a moderate exterior tone and a mild interior tone and is suited to the enthusiast who wants a subtle but distinctive exhaust note. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. The kit is a true bolt-on and includes everything you need to easily install at home with basic hand tools.

The MagnaFlow 1964-1966 Ford Mustang Street Series Crossmember-Back Performance Exhaust System 15815 brings enhanced engine sound and dyno-proven performance to your 2.8L, 3.3L, 4.3L, 4.7L 1964-1966 Ford Mustang with a healthy helping of our deep, resonant signature exhaust note at Moderate exterior and Mild interior sound levels. Thanks to its durable, corrosion resistant stainless steel design, this Ford Mustang exhaust system will handle whatever tarmac you decide to leave your mark on. This performance exhaust kit features a crossmember-back layout designed to replace your Ford Mustang’s exhaust system from the crossmember on back. With its fast-flowing, mandrel bent 2.5in. main piping and 2 Straight-Through mufflers ending in a Dual Split Rear exit with 2.75in. Polished Welded-On Single Wall Turndown Cut Edge tips, your muscle car will be sounding as awesome as it looks. Extensive 3D scanning during development has resulted in a direct-fit design that you can easily install yourself. 15815 is produced using CNC precision robotic manufacturing techniques and is backed by MagnaFlow’s limited lifetime construction warranty.

Product Features:

• Dyno-proven performance
• Durable corrosion-resistant stainless steel construction
• CNC precision robotic manufacturing techniques

For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

American Thunder exhaust systems deliver the aggressive sounds you want, as well as the performance gains you demand. This T409 stainless steel American Thunder Axle-back for the 2013 Mustang GT features specially modified Super 44 series mufflers with polished 4.00 in. stainless tips and is a direct bolt on for the restyled Mustang. A lifetime limited warranty provides assurance that this American made exhaust will deliver that famous Flowmaster sound for many years to come.

Product Features:

• Stainless steel construction
• Dyno tuned for maximum performance
• Patented Delta Flow technology
• Made in the USA
• Premium Flowmaster quality

Our race-oriented Outlaw systems are designed to replace original rear mounted mufflers located behind the rear axle using factory style connections. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. Outlaw systems deliverance level, ultra aggressive interior and exterior tone and are suited to the enthusiast who wants the most aggressive components they can purchase. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Product Features:

• Mandrel bent 16 gauge 409 stainless tubing
• Aggressive and powerful exterior exhaust tone
• Includes hangers and hardware for easy installation
• Axle back system
• Dyno tuned for maximum performance

This moderate sounding system is designed to replace the original rear mounted mufflers located behind the rear axle. With easy fit in mind, the system is mandrel bent for maximum performance and includes specially selected mufflers to support the performance image of the car. As a Force II system, it delivers a moderate exterior tone with moderate interior sound level that is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, the system includes all necessary parts and hardware for easy installation.

The MagnaFlow 1994-1998 Ford Mustang Street Series Cat-Back Performance Exhaust System brings out the personality of your 4.6L, 5.0L 1994-1998 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 15638 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. 15638 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

The MagnaFlow 2005-2009 Ford Mustang Competition Series Cat-Back Performance Exhaust System 16605 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 4.0L 2005-2009 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 Welded-On Double Wall Angle Cut Rolled 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 16605 is engineered to make your vehicle’s engine produce Aggressive exterior and Moderate interior sound levels, befitting its competition-oriented design. 16605’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