The Flowmaster FlowFX Cat-Back exhaust system is a high-performance upgrade designed for 2020-2026 GM 2500HD and 3500HD trucks equipped with the 6.6L gas engines. Constructed from durable 409 stainless steel, this system offers long-lasting reliability and resistance to corrosion. It features a 3.50-inch inlet pipe that leads into a Flow FX series "straight-through" muffler, providing an aggressive sound profile without drone and maximizing performance gains. The system is engineered to improve exhaust flow, resulting in increased horsepower and torque, with dyno-tested gains of up to 11 hp and 10 lb-ft at the rear wheels. Its design allows for a straightforward installation using factory hanger locations, making it suitable for DIY enthusiasts. The kit includes all necessary hardware and instructions, backed by Flowmaster's Lifetime Limited Warranty.
This exhaust system is compatible with both 2WD and 4WD models of the specified GM trucks, serving as a direct bolt-on replacement for the factory system. It is ideal for drivers seeking enhanced sound, improved acceleration, and towing performance, whether for daily driving or performance applications. The system connects seamlessly to the factory tailpipe, providing a clean, custom look and sound. Designed specifically for the 2020-2026 model years, it ensures a perfect fit and reliable performance, making it a popular choice for truck owners looking to upgrade their vehicle’s exhaust system with minimal hassle.
