- Discover the ultimate upgrade for your semi truck with Trux Exhaust 7 Inch systems, meticulously designed to enhance performance and durability. Our premium selection includes the 7" Curved 58 Deg Elbow 52" Spool, perfect for Peterbilt 379 models from 1987 through 2003, ensuring a flawless fit and optimal exhaust flow. For newer Peterbilt 579 models, explore the 7" Curved 90 Deg Elbow 55" Spool, tailored for 2003 through 2006 trucks, providing superior efficiency and longevity. Additionally, we offer the 7" Curved 58 Deg Elbow 55" Spool for 2003 through 2006 exhaust systems, delivering unmatched reliability and performance. For those with older models, the 7 inch Curved 90 Deg Elbow 52" Spool for 1987 through 2003 trucks is an ideal choice, combining robust construction with seamless installation. Enhance your truck's exhaust system with our top-of-the-line Trux Exhaust 7 Inch products, including Walker exhaust components, exhaust clamps, and flexible exhaust pipes. Whether you need a 33mm to inches conversion or a 12/700 exhaust clamp, we have you covered. Upgrade now and experience the difference in power, efficiency, and durability. Shop today and ensure your truck runs smoother and stronger with our exceptional exhaust solutions.