The RubberDuck4x4 Black Box Performance PMD is definitely bigger & better than any kit on the market. We use a Heavy Duty PMD that is nearly twice as thick as the factory unit to improve heat dissipation and increase reliability. Next we mounted it inside the sealed aluminum "Black Box" that not only protects it from off-road abuse but further increases its heat dissipation capabilities. It installs with plug and play simplicity and the five foot extension cable allows mounting in almost any location on your truck. Finally the 5 year warranty and unbelievable price makes this an option no true off-road truck should be without. Comes standard with the #7 resistor, other sizes available upon request.