- Upgrade your semi truck's performance and style with the Dynaflex Exhaust 8 Inch, meticulously designed for optimal efficiency and a sleek look. Our extensive range of Dynaflex products includes the Dynaflex Peterbilt 2010 389 10 Exhaust Kit, perfect for enhancing your truck's power and sound. For those driving a Peterbilt Unibilt T4 389 from 2011-2015, we offer the 8 Inch OEM Style Exhaust Kit, ensuring a perfect fit and superior performance. Additionally, the 8 Inch 90 Deg Peterbilt Unitbilt T4 389 2011-2015 Exhaust Kit provides a unique angle for improved exhaust flow. For day cab models, the 8 Inch 90 Deg Elbow Peterbilt 389 DPF+SCR DayCab 2011-2015 is an excellent choice, offering durability and efficiency. Lastly, the 8 Inch Pickett Peterbilt T4 389 Full DR 2011-2017 RP Exhaust Kit is ideal for those seeking a comprehensive upgrade. Explore our range of high-quality exhaust kits to find the perfect match for your semi truck, ensuring enhanced performance, longevity, and a commanding presence on the road. Whether you drive a Peterbilt 389, Peterbilt 589, or a Kenworth T800, our selection includes everything you need, from flexible exhaust pipes to exhaust clamps. Convert 33mm to inches with ease and secure your exhaust system with our reliable 735/88 exhaust clamps. Don't miss out on the opportunity to elevate your truck's performance and style—shop now and experience the Dynaflex difference!