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2012–2021 Jeep Grand Cherokee / Jeep Grand Cherokee SRT 6.4L HEMI
818107
Overview:
The Flowmaster American Thunder Cat-Back Exhaust System is engineered specifically for Jeep Grand Cherokee models equipped with the 6.4-liter HEMI engine from 2012 through 2021, including the SRT variants from 2013 to 2021. Designed to enhance both performance and sound, this exhaust system delivers a balanced aggressive tone that complements the powerful V8 engine while improving exhaust flow for increased horsepower and torque. Ideal for Jeep enthusiasts seeking a durable, high-quality upgrade that combines style, sound, and performance.
With a focus on precision engineering and ease of installation, the American Thunder system offers a direct bolt-on fit using factory mounting points, making it a practical choice for those looking to upgrade their exhaust without extensive modifications.
Key Features:
This cat-back exhaust system incorporates advanced Flowmaster technology and premium materials to provide a superior driving experience. Key features include:
Construction & Design:
The American Thunder Cat-Back Exhaust System is crafted from premium 409 stainless steel, known for its excellent corrosion resistance and long-lasting durability. The mandrel-bent tubing maintains consistent diameter throughout bends, preventing flow restrictions and enhancing exhaust scavenging. The Super 44 mufflers are designed to deliver a deep, aggressive tone without excessive noise, striking a balance between performance and daily drivability.
Polished 4.00-inch stainless steel tips not only resist corrosion but also add a refined, aggressive aesthetic to the rear of the Jeep Grand Cherokee. The dual rear exit layout complements the vehicle’s muscular stance and performance character.
Performance & Sound
This exhaust system is engineered to improve exhaust flow, resulting in measurable performance gains. Dyno testing shows an increase of up to 6 horsepower and 9 lb-ft of torque at the rear wheels compared to the factory exhaust. The Super 44 mufflers combined with tuned resonators produce a bold, throaty exhaust note that enhances the driving experience without overwhelming cabin noise or drone during cruising.
Installation & Fitment:
The Flowmaster American Thunder Cat-Back Exhaust System is designed for a direct bolt-on installation on 2012–2021 Jeep Grand Cherokee models with the 6.4L HEMI engine, including SRT models from 2013 to 2021. It uses all factory mounting points and includes all necessary hardware, allowing for a straightforward installation process that typically requires no cutting or welding. This ensures a secure fit and preserves the vehicle’s factory integrity.
What's Included:
Ideal For:
This exhaust system is perfect for Jeep Grand Cherokee owners who want to enhance their vehicle’s performance and sound without sacrificing daily drivability. It suits enthusiasts looking for a durable, high-quality exhaust upgrade that delivers a commanding exhaust note and noticeable power gains. Whether you drive a standard Grand Cherokee or the high-performance SRT model, the American Thunder Cat-Back exhaust offers a balanced upgrade that complements the vehicle’s aggressive character.
Flowmaster is an iconic exhaust brand famous for signature exhaust tone and performance mufflers, as well as complete axle-back and cat-back systems. Built for muscle cars, trucks, and performance builds, Flowmaster systems are designed to improve flow and deliver the sound character enthusiasts chase.
ETA stands for Estimated Time of Arrival. The date shown is calculated using our Available-to-Promise (ATP) system, which tracks real-time supplier commitments to determine when a product is expected to be available for delivery. Specifically, the date is calculated by adding 9 business days from the date a supplier has committed to ship the product, representing a worst-case scenario for when we can expect to receive inventory.
Please note: The ETA is an estimate, not a guarantee. While we work closely with our suppliers to keep dates as accurate as possible, delays due to shipping carriers, weather, customs, or supplier-side issues may occasionally push the actual arrival beyond the date shown. Likewise, inventory may arrive sooner than the ETA in many cases. If you would like to be notified for when this item arrives, sign up for our back in stock notifications!
PART # 818107
818107 Flowmaster 12-21 Jeep Grand Cherokee / SRT American Thunder Cat-Back Exhaust System. This stainless steel cat-back exhaust features 3.0-inch mandrel-bent tubing and Super 44 mufflers for enhanced exhaust flow and a bold, aggressive sound. Designed for the 6.4L Hemi engine, it delivers up to 6 hp and 9 lb-ft torque gains. Polished 4.0-inch dual rear exit tips provide a custom look. Easy installation with factory mounting points and includes all hardware. Backed by Flowmaster’s Lifetime Limited Warranty for lasting performance and durability.
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MADE IN THE USA
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2012–2021 Jeep Grand Cherokee / Jeep Grand Cherokee SRT 6.4L HEMI
818107
Overview:
The Flowmaster American Thunder Cat-Back Exhaust System is engineered specifically for Jeep Grand Cherokee models equipped with the 6.4-liter HEMI engine from 2012 through 2021, including the SRT variants from 2013 to 2021. Designed to enhance both performance and sound, this exhaust system delivers a balanced aggressive tone that complements the powerful V8 engine while improving exhaust flow for increased horsepower and torque. Ideal for Jeep enthusiasts seeking a durable, high-quality upgrade that combines style, sound, and performance.
With a focus on precision engineering and ease of installation, the American Thunder system offers a direct bolt-on fit using factory mounting points, making it a practical choice for those looking to upgrade their exhaust without extensive modifications.
Key Features:
This cat-back exhaust system incorporates advanced Flowmaster technology and premium materials to provide a superior driving experience. Key features include:
Construction & Design:
The American Thunder Cat-Back Exhaust System is crafted from premium 409 stainless steel, known for its excellent corrosion resistance and long-lasting durability. The mandrel-bent tubing maintains consistent diameter throughout bends, preventing flow restrictions and enhancing exhaust scavenging. The Super 44 mufflers are designed to deliver a deep, aggressive tone without excessive noise, striking a balance between performance and daily drivability.
Polished 4.00-inch stainless steel tips not only resist corrosion but also add a refined, aggressive aesthetic to the rear of the Jeep Grand Cherokee. The dual rear exit layout complements the vehicle’s muscular stance and performance character.
Performance & Sound
This exhaust system is engineered to improve exhaust flow, resulting in measurable performance gains. Dyno testing shows an increase of up to 6 horsepower and 9 lb-ft of torque at the rear wheels compared to the factory exhaust. The Super 44 mufflers combined with tuned resonators produce a bold, throaty exhaust note that enhances the driving experience without overwhelming cabin noise or drone during cruising.
Installation & Fitment:
The Flowmaster American Thunder Cat-Back Exhaust System is designed for a direct bolt-on installation on 2012–2021 Jeep Grand Cherokee models with the 6.4L HEMI engine, including SRT models from 2013 to 2021. It uses all factory mounting points and includes all necessary hardware, allowing for a straightforward installation process that typically requires no cutting or welding. This ensures a secure fit and preserves the vehicle’s factory integrity.
What's Included:
Ideal For:
This exhaust system is perfect for Jeep Grand Cherokee owners who want to enhance their vehicle’s performance and sound without sacrificing daily drivability. It suits enthusiasts looking for a durable, high-quality exhaust upgrade that delivers a commanding exhaust note and noticeable power gains. Whether you drive a standard Grand Cherokee or the high-performance SRT model, the American Thunder Cat-Back exhaust offers a balanced upgrade that complements the vehicle’s aggressive character.
Flowmaster is an iconic exhaust brand famous for signature exhaust tone and performance mufflers, as well as complete axle-back and cat-back systems. Built for muscle cars, trucks, and performance builds, Flowmaster systems are designed to improve flow and deliver the sound character enthusiasts chase.
Free Standard Shipping on orders over $250. Select “Free Shipping” at checkout.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
Free Standard Shipping on orders over $250. Select “Free Shipping” at checkout.
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
