aFe Twisted 1-3/4in 304SS Shorty Header 20-23 GM 2500/3500HD 6.6L V8

1-3/4" 304 Stainless Steel Construction: This system is constructed of 1-3/4" mandrel-bent 304 stainless steel tubing for maximum strength and durability. Powerful Sound: This system produces a powerful sound unleashing all available horsepower and torque. Installation: Utilizing factory style flanges this system is a direct bolt-on system, which requires no cutting or modifications for a hassle-free installation. Heavy Duty Flanges: Factory style laser cut flanges are used used for a secure leak-free seal. Optimized Tube Lengths: Tube lengths are optimized for true pulse control technology which improves flow and performance. Retains Factory Sensors: This system has been designed to retain all your factory sensors for a hassle free installation. Computer-Aided Design: Utilizing state-of-the-art computer-aided design technology, this system is designed for custom, high tolerance factory fitment. MIG-Welded: 100% MIG-Welded for race-proven strength and durability. Emissions Disclaimer: This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.This Part Fits: Year Make Model Submodel 2021-2023 Chevrolet Express 2500 Base 2021-2023 Chevrolet Express 2500 LS 2021-2023 Chevrolet Express 2500 LT 2021-2023 Chevrolet Express 3500 Base 2021-2023 Chevrolet Express 3500 LS 2021-2023 Chevrolet Express 3500 LT 2020-2023 Chevrolet Silverado 2500 HD Custom 2020-2023 Chevrolet Silverado 2500 HD High Country 2020-2023 Chevrolet Silverado 2500 HD LT 2020-2023 Chevrolet Silverado 2500 HD LTZ 2020-2023 Chevrolet Silverado 2500 HD WT 2020-2023 Chevrolet Silverado 3500 HD High Country 2020-2023 Chevrolet Silverado 3500 HD LT 2020-2023 Chevrolet Silverado 3500 HD LTZ 2020-2023 Chevrolet Silverado 3500 HD WT 2020-2023 GMC Sierra 2500 HD AT4 2020-2021 GMC Sierra 2500 HD Base 2020-2023 GMC Sierra 2500 HD Denali 2022-2023 GMC Sierra 2500 HD Pro 2020-2023 GMC Sierra 2500 HD SLE 2020-2023 GMC Sierra 2500 HD SLT 2020-2023 GMC Sierra 3500 HD AT4 2020-2021 GMC Sierra 3500 HD Base 2020-2023 GMC Sierra 3500 HD Denali 2022-2023 GMC Sierra 3500 HD Pro 2020-2023 GMC Sierra 3500 HD SLE 2020-2023 GMC Sierra 3500 HD SLT