A modification package deal designed to extend the displacement of the Jeep 4.0 liter inline-six engine. This sometimes entails changing the crankshaft, connecting rods, and pistons with elements which have an extended stroke, successfully rising the engine’s bore and/or stroke dimensions. The target is to reinforce the engine’s low-end torque and total energy output.
The attraction lies within the potential for vital efficiency positive aspects with out resorting to extra complicated and dear engine swaps. It presents a stability between affordability and improved driving expertise, significantly helpful for off-road functions the place low-end torque is essential. The idea has advanced over time, with varied producers and builders providing completely different configurations and part decisions, catering to various efficiency targets and budgets.