Flowmaster American Thunder Cat-Back Exhaust — Fits 2013-2018 Ford Focus ST 2.0L

SKU: BDXN_817637
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Sale price$879.95
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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 Flowmaster

Flowmaster engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Flowmaster lineup with fast shipping and expert fitment support — order with confidence.

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Flowmaster American Thunder Exhaust for Ford Focus ST

Transform your 2013-2018 Ford Focus ST with the legendary sound and performance of the Flowmaster American Thunder cat-back exhaust system. Designed specifically for the 2.0L EcoBoost engine, this exhaust kit is engineered to provide a deep, aggressive tone that lets everyone know you mean business, without the annoying drone during highway cruising.

Exhaust System Highlights

  • Aggressive Sound: Features the signature American Thunder deep exhaust note.
  • Improved Flow: Mandrel-bent piping reduces backpressure for better throttle response.
  • Stainless Steel Construction: Durable, rust-resistant materials for long-lasting performance.
  • Direct Fit: Designed for an easy bolt-on installation on 2013-2018 Focus ST models.
  • Premium Tips: Includes 3-3/4 inch polished tips for a clean, finished look.

The Flowmaster American Thunder system is more than just a sound upgrade; it is a performance enhancement. By replacing the restrictive factory exhaust, this kit allows your EcoBoost engine to breathe more freely, resulting in improved power delivery and a more engaging driving experience. Every component is crafted from high-quality stainless steel to ensure it withstands the elements and maintains its performance for years to come. Whether you are commuting to work or tearing up the backroads, this exhaust system delivers the perfect balance of performance and style for your hot hatch. Upgrade your Ford Focus ST today with high-quality exhaust solutions from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Flowmaster

Flowmaster engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Flowmaster lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Flowmaster American Thunder Exhaust for Ford Focus ST

Transform your 2013-2018 Ford Focus ST with the legendary sound and performance of the Flowmaster American Thunder cat-back exhaust system. Designed specifically for the 2.0L EcoBoost engine, this exhaust kit is engineered to provide a deep, aggressive tone that lets everyone know you mean business, without the annoying drone during highway cruising.

Exhaust System Highlights

  • Aggressive Sound: Features the signature American Thunder deep exhaust note.
  • Improved Flow: Mandrel-bent piping reduces backpressure for better throttle response.
  • Stainless Steel Construction: Durable, rust-resistant materials for long-lasting performance.
  • Direct Fit: Designed for an easy bolt-on installation on 2013-2018 Focus ST models.
  • Premium Tips: Includes 3-3/4 inch polished tips for a clean, finished look.

The Flowmaster American Thunder system is more than just a sound upgrade; it is a performance enhancement. By replacing the restrictive factory exhaust, this kit allows your EcoBoost engine to breathe more freely, resulting in improved power delivery and a more engaging driving experience. Every component is crafted from high-quality stainless steel to ensure it withstands the elements and maintains its performance for years to come. Whether you are commuting to work or tearing up the backroads, this exhaust system delivers the perfect balance of performance and style for your hot hatch. Upgrade your Ford Focus ST today with high-quality exhaust solutions from GGCRACING.

Product Details

Product Description

About Flowmaster

Flowmaster engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Flowmaster lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Flowmaster American Thunder Exhaust for Ford Focus ST

Transform your 2013-2018 Ford Focus ST with the legendary sound and performance of the Flowmaster American Thunder cat-back exhaust system. Designed specifically for the 2.0L EcoBoost engine, this exhaust kit is engineered to provide a deep, aggressive tone that lets everyone know you mean business, without the annoying drone during highway cruising.

Exhaust System Highlights

  • Aggressive Sound: Features the signature American Thunder deep exhaust note.
  • Improved Flow: Mandrel-bent piping reduces backpressure for better throttle response.
  • Stainless Steel Construction: Durable, rust-resistant materials for long-lasting performance.
  • Direct Fit: Designed for an easy bolt-on installation on 2013-2018 Focus ST models.
  • Premium Tips: Includes 3-3/4 inch polished tips for a clean, finished look.

The Flowmaster American Thunder system is more than just a sound upgrade; it is a performance enhancement. By replacing the restrictive factory exhaust, this kit allows your EcoBoost engine to breathe more freely, resulting in improved power delivery and a more engaging driving experience. Every component is crafted from high-quality stainless steel to ensure it withstands the elements and maintains its performance for years to come. Whether you are commuting to work or tearing up the backroads, this exhaust system delivers the perfect balance of performance and style for your hot hatch. Upgrade your Ford Focus ST today with high-quality exhaust solutions from GGCRACING.

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