Magnaflow Competition Series Cat-Back System — 1999-2004 Ford Mustang GT 4.6L

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SKU: MAG15673
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Sale price$1,239.92 Regular price$1,386.56
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow 15673 Competition Series Cat-Back Exhaust for 1999-2004 Ford Mustang GT

Unleash an aggressive, race-inspired exhaust note with the Magnaflow 15673 Competition Series Cat-Back Performance Exhaust System, specifically designed for the 1999-2004 Ford Mustang GT 4.6L. This system is engineered to deliver a deep, resonant tone that commands attention, coupled with dyno-proven performance gains. Featuring fast-flowing mandrel-bent 2.5-inch main piping and two Straight-Through mufflers, it ensures maximum exhaust flow for enhanced horsepower and torque.

Key Features:

  • Aggressive Sound: Delivers a powerful exterior sound level that complements the Mustang's performance.
  • Performance Optimized: Mandrel-bent 2.5-inch piping and Straight-Through mufflers maximize exhaust flow.
  • Dual Split Rear Exit: Features a sporty dual split rear exit configuration.
  • Premium Tips: Includes two 3.5-inch polished stainless steel clamp-on tips with a single wall, angle-cut edge for a custom look.
  • Vehicle Specific Fitment: Designed for 1999-2004 Ford Mustang GT models, including the 2001 GT Bullitt and 2003-2004 Mach 1.
  • Durable Stainless Steel: Constructed from high-quality stainless steel for longevity and corrosion resistance.

The Magnaflow 15673 system replaces your stock exhaust from the catalytic converter back, offering a significant upgrade in both sound and performance. While providing an aggressive exterior tone, the interior sound level is kept moderate, ensuring a comfortable driving experience. Elevate your Mustang's presence on the road and track with this exceptional cat-back system.

Find the best Magnaflow exhaust systems at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2004 Ford Mustang GT
2001 Ford Mustang GT Bullitt
2003-2004 Ford Mustang Mach 1

Product Details

Product Description
Part Numbers
Sizing & Fit

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow 15673 Competition Series Cat-Back Exhaust for 1999-2004 Ford Mustang GT

Unleash an aggressive, race-inspired exhaust note with the Magnaflow 15673 Competition Series Cat-Back Performance Exhaust System, specifically designed for the 1999-2004 Ford Mustang GT 4.6L. This system is engineered to deliver a deep, resonant tone that commands attention, coupled with dyno-proven performance gains. Featuring fast-flowing mandrel-bent 2.5-inch main piping and two Straight-Through mufflers, it ensures maximum exhaust flow for enhanced horsepower and torque.

Key Features:

  • Aggressive Sound: Delivers a powerful exterior sound level that complements the Mustang's performance.
  • Performance Optimized: Mandrel-bent 2.5-inch piping and Straight-Through mufflers maximize exhaust flow.
  • Dual Split Rear Exit: Features a sporty dual split rear exit configuration.
  • Premium Tips: Includes two 3.5-inch polished stainless steel clamp-on tips with a single wall, angle-cut edge for a custom look.
  • Vehicle Specific Fitment: Designed for 1999-2004 Ford Mustang GT models, including the 2001 GT Bullitt and 2003-2004 Mach 1.
  • Durable Stainless Steel: Constructed from high-quality stainless steel for longevity and corrosion resistance.

The Magnaflow 15673 system replaces your stock exhaust from the catalytic converter back, offering a significant upgrade in both sound and performance. While providing an aggressive exterior tone, the interior sound level is kept moderate, ensuring a comfortable driving experience. Elevate your Mustang's presence on the road and track with this exceptional cat-back system.

Find the best Magnaflow exhaust systems at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2004 Ford Mustang GT
2001 Ford Mustang GT Bullitt
2003-2004 Ford Mustang Mach 1

Product Details

Product Description

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow 15673 Competition Series Cat-Back Exhaust for 1999-2004 Ford Mustang GT

Unleash an aggressive, race-inspired exhaust note with the Magnaflow 15673 Competition Series Cat-Back Performance Exhaust System, specifically designed for the 1999-2004 Ford Mustang GT 4.6L. This system is engineered to deliver a deep, resonant tone that commands attention, coupled with dyno-proven performance gains. Featuring fast-flowing mandrel-bent 2.5-inch main piping and two Straight-Through mufflers, it ensures maximum exhaust flow for enhanced horsepower and torque.

Key Features:

  • Aggressive Sound: Delivers a powerful exterior sound level that complements the Mustang's performance.
  • Performance Optimized: Mandrel-bent 2.5-inch piping and Straight-Through mufflers maximize exhaust flow.
  • Dual Split Rear Exit: Features a sporty dual split rear exit configuration.
  • Premium Tips: Includes two 3.5-inch polished stainless steel clamp-on tips with a single wall, angle-cut edge for a custom look.
  • Vehicle Specific Fitment: Designed for 1999-2004 Ford Mustang GT models, including the 2001 GT Bullitt and 2003-2004 Mach 1.
  • Durable Stainless Steel: Constructed from high-quality stainless steel for longevity and corrosion resistance.

The Magnaflow 15673 system replaces your stock exhaust from the catalytic converter back, offering a significant upgrade in both sound and performance. While providing an aggressive exterior tone, the interior sound level is kept moderate, ensuring a comfortable driving experience. Elevate your Mustang's presence on the road and track with this exceptional cat-back system.

Find the best Magnaflow exhaust systems at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1999-2004 Ford Mustang GT
2001 Ford Mustang GT Bullitt
2003-2004 Ford Mustang Mach 1

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