This is where things start to get "saucy'! Stage 2 is putting a little strain on the engine/trans. Stage 2 requires methanol injection or ethanol injection and all the most listed from Stage 1 + and catless/header applications are highly recommended. (please note, we will not disable any emissions devices). Stage 2 is normally reserved for boosted applications, but if you have a NA car running E85 or very aggressive tuning, this is the tune you would want to select.