Let your truck breathe much more fresh air, resulting in better response and reliability with BD's Iron Horn S363SX-E kit w/ a 0.91 A/R ratio, 63mm Comp Wheel & 76mm Turbine Wheel. This kit will fit your 2007.5-2018 Dodge Cummins 6.7L and is rated for up to 550HP. Includes a brand new high flow T4 exhaust manifold!