--- product_id: 10754877 title: "Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive" brand: "flowmaster" price: "6715 zΕ‚" currency: PLN in_stock: true reviews_count: 2 url: https://www.desertcart.pl/products/10754877-flowmaster-17139-header-back-system-dual-rear-exit-american-thunder store_origin: PL region: Poland --- # Moderate/Aggressive Sound 16 Gauge Tubing Easy Installation Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive **Brand:** flowmaster **Price:** 6715 zΕ‚ **Availability:** βœ… In Stock ## Summary > πŸš— Rev Up Your Ride with American Thunder! ## Quick Answers - **What is this?** Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive by flowmaster - **How much does it cost?** 6715 zΕ‚ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/10754877-flowmaster-17139-header-back-system-dual-rear-exit-american-thunder) ## Best For - flowmaster enthusiasts ## Why This Product - Trusted flowmaster brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Built to Last:** Durable construction ensures longevity and reliability on the road. - β€’ **Effortless Setup:** Includes all necessary hangers and hardware for a quick install. - β€’ **Unleash the Roar:** Experience a thrilling exhaust note that turns heads. - β€’ **Precision Engineering:** Crafted with mandrel bent 16 gauge tubing for optimal flow. - β€’ **Tailored for Performance:** Designed for a dual rear exit that enhances your vehicle's aesthetics. ## Overview The Flowmaster 17139 Header-back System is engineered for performance enthusiasts seeking a moderate to aggressive exhaust tone. Featuring mandrel bent 16 gauge tubing, this system ensures optimal exhaust flow while providing an eye-catching dual rear exit design. Installation is a breeze with included hangers and hardware, making it the perfect upgrade for any vehicle. ## Description 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. Does not fit convertible. ## Features - Mandrel bent 16 Gauge Tubing - Moderate to Aggressive Sound Exterior Exhaust Tone - Includes hangers and hardware for easy installation - Header-back System ## Images ![Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive - Image 1](https://m.media-amazon.com/images/I/31nEBANwmFL.jpg) ![Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive - Image 2](https://m.media-amazon.com/images/I/71JMRz+31oL.jpg) ![Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive - Image 3](https://m.media-amazon.com/images/I/61omenxTncL.jpg) ![Flowmaster 17139 Header-back System - Dual Rear Exit - American Thunder - Moderate/Aggressive - Image 4](https://m.media-amazon.com/images/I/61TQN3avD2L.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐ Poor fit. *by D***9 on Reviewed in the United States πŸ‡ΊπŸ‡Έ on February 4, 2017* Poor fit. Wrong mufflers (should be dual offset). Be prepared to cut and weld (flanges). It rubs and hits everywhere. Had to buy new mufflers and take it to an exhaust shop to be correctly fitted. On the plus side the Super 44 mufflers are the best sounding mufflers I have ever heard. Much throatier than the 40 series I have on my other Camaros. ### ⭐ Do not buy *by S***N on Reviewed in the United States πŸ‡ΊπŸ‡Έ on June 21, 2020* Does not even come close to fitting a 1969 Camaro even though I cross checked the part number to Flowmasters website. The hanger mounts weren't welded in the correct spots. The over the axle bends were way off and rubbed the axle. The h-pipe piece was way too long. Not a dang piece of this kit lines up. Compete trash and unbelievable that Flowmaster even sells this. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/10754877-flowmaster-17139-header-back-system-dual-rear-exit-american-thunder](https://www.desertcart.pl/products/10754877-flowmaster-17139-header-back-system-dual-rear-exit-american-thunder) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-20*