- Upgrade your semi truck's performance and style with our premium Dynaflex Exhaust 6 Inch systems, designed to deliver unparalleled efficiency and a bold look. Our extensive range includes the 6 Inch Peterbilt 359/379/389G 55" Full Diameter Exhaust Kit, perfect for those seeking a robust and reliable solution. For older models, we offer the 6 Inch OEM Style Elbow Peterbilt 379 1987-2003 Exhaust Kit, ensuring a perfect fit and seamless installation. If you own a newer model, the 6 Inch 90 Degree Elbow Peterbilt 379 2003-2006 Exhaust Kits are tailored to meet your needs, providing optimal performance and durability. Additionally, our 6 Inch OEM Style Elbow Peterbilt 379 2003-2006 Exhaust Kit and 6 Inch 90 Degree Peterbilt 379 1987-2003 Exhaust Kits are crafted to enhance your truck's exhaust system, ensuring longevity and superior performance. Whether you're upgrading for better fuel efficiency, enhanced power, or a sleek appearance, our Dynaflex Exhaust 6 Inch products are the ultimate choice for your Peterbilt semi truck. Explore our collection today and experience the difference in quality and performance. Plus, we offer a variety of related products such as Ford F650 exhaust systems, Walker exhaust components, durable exhaust clamps, and flexible exhaust pipes. Don't forget to check out our 57 inch tail lights and exhaust flex pipes for a complete upgrade. Convert 33mm to inches easily with our tools and find the perfect exhaust clamp for your Ford Powerstroke 6.0. Enhance your Peterbilt 567 with our top-notch products and take your truck to the next level.