2010 Ford F150 Flowmaster Installation Product #817478 For the person who is looking for a complete Cat-back dual exhaust system with an quieter tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. This Force II system delivers a moderate exterior tone and mild interior tone, and is suited to customers looking for efficiency improvements without a lot of noise. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.