- Discover the ultimate upgrade for your semi truck with the Dynaflex Exhaust 7 Inch, designed to deliver unparalleled performance and style. Perfect for Peterbilt models 359, 379, and 389G, our 55" Full Exhaust Kit ensures your truck not only looks impressive but also runs efficiently. This high-quality exhaust system is engineered to enhance your truck's power and fuel efficiency while reducing backpressure and improving overall engine performance. Whether you're looking to replace an old exhaust or upgrade to a more robust system, the Dynaflex Exhaust 7 Inch is your go-to solution. Our comprehensive kit includes everything you need for a seamless installation, ensuring a perfect fit and long-lasting durability. Don't miss out on related products like the 7 Inch Peterbilt 359/379/389G 55" Full Exhaust Kit, which offers the same exceptional quality and performance. Elevate your driving experience with the Dynaflex Exhaust 7 Inch and enjoy the benefits of a top-tier exhaust system designed specifically for your Peterbilt semi truck. Shop now and experience the difference! Whether you drive a Peterbilt 379 or a Peterbilt 579, our exhaust systems are compatible and reliable. Pair your new exhaust with Walker exhaust clamps for a secure fit, and explore our range of flexible exhaust pipes for added versatility. Convert 33mm to inches easily with our handy tools, and ensure your 379 Peterbilt is always in top shape. For those in need of specific parts, we also offer the 12/700 exhaust clamp and the 735/88 flexible exhaust pipe. Take action today and upgrade your truck with Dynaflex for unmatched performance and style.