| Rapid Power Module *Adjustable 10%-20%. *Toggle switch not included. Fits: 1998-2005 Caterpillar 3126/C7/C9 Part #: 40630 The Rapid Power module from Bully Dog is designed to increase power and improve fuel economy on farm tractors, construction equipment, RVs, and mid-sized commercial trucks. The Rapid Power module increases your engine's horsepower allowing you to pull more and move faster, all while saving fuel. The Cat Rapid Power module works on CAT 3126, C7 & C9 engines from 1998-2005. It includes three settings: stock, a 15%, and 30% increase in horsepower and torque. The module can be adjusted in two ways: by adjusting switches on the unit or via an optional Rapid Power module switch (Part # 40610). | 
