Big Gun Rev Boxes are designed to increase your RPM limit by approximately 1,000 RPM depending on the model of your machine. In addition, Big Gun's Rev Boxes are remapped with a built-in timing curve which provides noticeable horse power and torque gains. Big Gun Rev Boxes are an easy plug-n-play installation. Increase your RPM limit by approximately 1,000 RPM while advancing the timing for a bit more torque on the bottom end. Enhances the power curve and adds up to 3 horsepower. Includes everything you need for an easy plug-n-play installation with easy to follow instructions. Six-month manufacturer's warranty. Note: Image is for display purposes ONLY; actual product will vary with fitment.