Wilson Manifolds has recently announced the Thrasher, a new, bolt-on intake system for all 5.9 liter common-rail Cummins engines from 2003 to mid-2007. Depending upon the state of tune, the Thrasher can generate in excess of 300 extra ft-lb of torque, or with lighter throttle use, the equivalent in fuel savings. In contrast with the OEM arrangement, this new induction system provides greater equality of air-fuel distribution, especially in the cruise zone of 2,000 to 2,250 rpm. As a result, the Thrasher generates not only amazing gains in both torque and fuel economy but also improves horsepower output, lowers exhaust gas temperatures, reduces exhaust emissions (less smoke), and improves drivability and turbo lag. Check out the results from Wilson's dynamometer testing. The graph below demonstrates the gains in both torque and horsepower of the Wilson Thrasher manifold when compared to the OEM manifold. With no other modifications performed, the Thrasher intake showed an increase of 30 hp and 79 ft-lb of torque. This graph shows an increase of 117 hp and 307 ft-lb. over the OEM manifold with the Wilson Thrasher intake and an ECU re-calibration from a Smarty Tuner 4, although the Thrasher should work with most hand-held tuners. What's more, the greater the power improvements made to your engine, the greater the performance or economy benefits of the Thrasher. That means the Thrasher intake is the perfect addition to your modified truck. The Wilson Manifolds Thrasher intake kit contains a cast alloy elbow, billet base plate, stainless/Viton rubber gasket, and all necessary fasteners. Installation takes about two hours. Expect pricing to be around $550.