Fits: 2004–2005 Chevrolet Silverado 2500 HD 2004–2005 Chevrolet Silverado 3500 2004–2005 GMC Sierra 2500 HD 2004–2005 GMC Sierra 3500 aFe46-60029Headers & ManifoldsThe aFe Bladerunner Turbo Inlet Manifold increases performance to your Duramax by 23hp and 57lbs x ft. torque while increasing air flow 73-percent over the factory turbo inlet. The Bladerunner turbo inlet manifold also improves turbo spool up times and lowers exhaust gas temperature (EGTs). This unit is constructed out of durable A356-T6 aluminum and uses the patented multi-direction vane (MDV) technology to help guide air through the manifold to your turbo. This kit comes complete with turbo inlet manifold and all hardware needed for an easy installation.aFe BladeRunner turbo inlet manifolds increase performance to your engine while increasing air flow over the factory turbo inlet. BladeRunner turbo inlet manifolds also improve turbo spool up times and lowers exhaust gas temperature (EGT). They're constructed of durable A356-T6 aluminum and use the patented multi-direction vane (MDV) technology to help guide air through the manifold to your turbo. BladeRunner manifolds come complete with all necessary mounting hardware.