aFe Twisted 1-3/4in 304SS Shorty Header 20-23 GM 2500/3500HD 6.6L V8 Exterior Styling>Diffusers 5-percent greater coolant capacity to

5-percent greater coolant capacity to improve cooling efficiency

It has a simple leveling adjustment of +/-3deg

As the leader in air suspension products for more than 75 years

Now that is value added engine retarding at its engineered finest

We continue to be innovative in product design

aFe Twisted 1-3/4in 304SS Shorty Header 20-23 GM 2500/3500HD 6.6L V8 Exterior Styling>Diffusers 5-percent greater coolant capacity to1 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