TheÂ AFE 46-20049 3" BladeRunner Intercooler Tube (Hot Side) outflows the factory tube in your 2004.5-2010 GM 6.6L Duramax by up to 67% and produced up to 16HP & 49 lb-ft of torque. Constructed of 3" mandrel bent stainless steel for smooth air flow transition and increased power. This tube comes complete with 5-ply heavy duty couplings and constant tension T-bolt clamps for a tight and secure installation. Features:Â +16HP & 49 Lb-ft tq.Â 3" Stainless Steel Construction Smooth-Flow Mandrel Bent TubingÂ CARB EO# D-550-8 (For 2004.5-2007 ONLY) CA Residents: CARB E.O. Number on file - LEGAL for use in California.