I accept: Stage 2 Naturally Aspirated: -CNC Matched Intake Manifold and Cylinder Heads
-High Flow Exhaust Headers
-90mm Throttle Body
-Speedfactory Cold Air Intake
-Performance Exhaust from the catalytic converter back (cat-back exhaust)
-Speedfactory Stage 2 PCM Tuning
-Unique 20” Forged Wheels
-Speedfactory interior and exterior upgrades
- 3 year, 36,000 mile warranty applied to the motor along with the factory warranty
-Results: Speedfactory has stated that the 6.1L (SRT-8) Challenger with the Stage 2 NA kit can expect around 530 crank horsepower. That is an increase of around 24%, so similar results on the 5.7L Hemi would give the 5.7 around 460 horsepower, but that is completely speculative.
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