The Flowmaster 20-25 GM 2500HD 6.6L CCB FlowFX DOS Exhaust System is a high-performance cat-back exhaust designed for 2020-2025 GM 2500HD and 3500HD trucks equipped with the 6.6-liter gas engine. Constructed entirely from durable 409 stainless steel, this system features 3.50-inch to dual 3.00-inch mandrel bent pipes that enhance exhaust gas flow. It incorporates a Flow FX "straight-through" muffler to deliver a moderate sound level while maximizing performance, with dyno testing showing gains of +9 horsepower and +10 lb-ft of torque at the rear wheels. The system exits on both sides behind the rear wheels, with 4.50-inch black ceramic tips that add style and a custom appearance. It uses all factory hanger locations and includes installation instructions and hardware for straightforward, at-home installation. Backed by Flowmaster's Lifetime Limited Warranty, it offers a reliable upgrade for serious enthusiasts.
Designed specifically for 2020-2025 GM 2500HD and 3500HD trucks with the 6.6-liter gas engine, this exhaust system is a direct bolt-on replacement that enhances performance and sound. It fits models with the specified engine and chassis configuration, providing a seamless upgrade for street use, daily driving, or performance tuning. The system's dual exit design and high-quality stainless steel construction ensure durability and a distinctive look, while the mandrel bent pipes optimize exhaust flow for improved power. The included hardware and instructions facilitate easy installation, making it suitable for DIY enthusiasts. This exhaust system is ideal for those seeking increased horsepower, torque, and a custom aesthetic on their heavy-duty truck.
