Flowmaster
Flowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3L
Flowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3L
Flowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3L
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Flowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3LFlowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3LFlowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3L
Flowmaster

Flowmaster American Thunder Cat-Back Exhaust Kit 3" Dual Rear Exit — Fits 19-21 GM 1500 5.3L

SKU: BDXN_817895

About Flowmaster Flowmaster engineers high-quality automotive parts and accessories trusted ...Read more

Price:
$1,199.95
11990 ENTRIES10X
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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

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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 Cat-Back Exhaust for GM 1500 (2019-2021)

Embrace the iconic Flowmaster sound with the American Thunder Cat-Back Exhaust System, tailored for 2019-2021 GM 1500 pickup trucks equipped with the 5.3L engine. This system delivers a powerful, classic muscle car tone that enhances your truck's presence.

System Features:

  • System Type: Cat-Back Exhaust Kit
  • Series: American Thunder
  • Diameter: 3 inches
  • Exit Style: Dual Rear Exit
  • Tips: Dual 4-inch Black Ceramic Tips
  • Material: High-grade Stainless Steel
  • Finish: Natural
  • Vehicle Fitment: 2019-2021 GM 1500 5.3L Trucks

The American Thunder series is renowned for its deep, mellow, and aggressive exhaust note, reminiscent of classic performance vehicles. This cat-back system is designed to bolt directly onto your 2019-2021 GM 1500 5.3L, replacing the factory exhaust from the catalytic converter back for optimal performance and sound. The 3-inch diameter tubing ensures unrestricted exhaust flow, maximizing horsepower and torque gains. Featuring a dual rear exit with striking 4-inch black ceramic tips, this system adds a custom, aggressive look to the rear of your truck. Constructed from durable stainless steel, it guarantees long-lasting performance and resistance to corrosion. If you desire the legendary Flowmaster sound and a stylish upgrade for your GM truck, the American Thunder Cat-Back is an excellent choice. Purchase yours today at GGCRACING.

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 Cat-Back Exhaust for GM 1500 (2019-2021)

Embrace the iconic Flowmaster sound with the American Thunder Cat-Back Exhaust System, tailored for 2019-2021 GM 1500 pickup trucks equipped with the 5.3L engine. This system delivers a powerful, classic muscle car tone that enhances your truck's presence.

System Features:

  • System Type: Cat-Back Exhaust Kit
  • Series: American Thunder
  • Diameter: 3 inches
  • Exit Style: Dual Rear Exit
  • Tips: Dual 4-inch Black Ceramic Tips
  • Material: High-grade Stainless Steel
  • Finish: Natural
  • Vehicle Fitment: 2019-2021 GM 1500 5.3L Trucks

The American Thunder series is renowned for its deep, mellow, and aggressive exhaust note, reminiscent of classic performance vehicles. This cat-back system is designed to bolt directly onto your 2019-2021 GM 1500 5.3L, replacing the factory exhaust from the catalytic converter back for optimal performance and sound. The 3-inch diameter tubing ensures unrestricted exhaust flow, maximizing horsepower and torque gains. Featuring a dual rear exit with striking 4-inch black ceramic tips, this system adds a custom, aggressive look to the rear of your truck. Constructed from durable stainless steel, it guarantees long-lasting performance and resistance to corrosion. If you desire the legendary Flowmaster sound and a stylish upgrade for your GM truck, the American Thunder Cat-Back is an excellent choice. Purchase yours today at GGCRACING.

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