06/09/2008 06:49. With suspension and big tires in place on a 4x4, available horsepower and torque begin to wane. While lower axle gears will help restore some of the lost engine performance, many simply get used to the feeble power and acceleration and never regain what was lost. One easy, bolt-on method to take back the power is through the installation of a set of free-flowing headers, which will decrease exhaust backpressure and make it easier for exhaust gases to escape the cylinders more efficiently.

JBA headers are tuned to increase horsepower and torque throughout the rpm range.

The headers... // 4 Wheel Drive & Sport Utility Magazine