The MBRP Duramax System will lower your Exhaust Gas Temperature by as much as 200 degrees, while allowing your turbocharger quicker spool up time. This system has been dyno tested to produce as much as 25 horsepower and 39 foot pounds of torque. The horsepower and torque gains are extremely important, but the ability of an exhaust system to lower your exhaust gas temperatures so you can add other performance improvements is of prime consideration for your engine. There are also some mileage gains to be realized, based on your driving style and location.