The 3.8T 540 HP engine is a factory detuned version of the 3.8T 580 HP engine.
The 3.8T 540 HP engine is a factory detuned version of the 3.8T 580 HP engine. Therefore both engines will tune to the same power and torque specification.
Stage 1 Remap Hardware Requirements:
Stage 2 Remap Hardware Requirements: