- Discover the ultimate upgrade for your semi truck with the Dynaflex Exhaust 7 Inch system, designed to deliver unparalleled performance and durability. This premium exhaust solution is engineered to enhance your truck's efficiency and power, ensuring a smoother, more reliable ride. The Dynaflex Exhaust 7 Inch system is perfect for those looking to optimize their vehicle's exhaust flow and reduce backpressure, leading to improved fuel economy and engine longevity. Complement your setup with the 7 Inch 359 OEM Style Elbow 55 Inch Spool Exhaust Kit, a top-tier product that seamlessly integrates with your Dynaflex system. This kit includes a high-quality elbow and spool, meticulously crafted to match OEM specifications, ensuring a perfect fit and superior performance. Whether you're upgrading your existing exhaust or building a new system from scratch, the Dynaflex Exhaust 7 Inch and the 7 Inch 359 OEM Style Elbow 55 Inch Spool Exhaust Kit provide the ideal combination of reliability and efficiency. Don't miss out on the opportunity to enhance your semi truck's performance with these exceptional products. Shop now and experience the difference that Dynaflex quality can make. Perfect for Peterbilt 379 and Peterbilt 579 models, this system is compatible with Walker exhaust components and exhaust clamps. Whether you're converting 33mm to inches or working on a 379 Peterbilt, the Dynaflex system, including the 12/700 and 735/88 parts, ensures a seamless fit. Plus, the flexible exhaust pipe options make installation a breeze. Take action today and elevate your truck's performance to new heights!