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From what I understand if it's still on factory mapping it'll probably run really lean.
When installed the kn typhoon cai before getting my tunes from tom he said It was running really lean and too lean is bad


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#dailydriven
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Yeah, don't do it. You need a tune to keep it from running lean.

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Agreed, keep it and get the tune.

I ran my K&N CAI with my OBX header without a tune for 9-10 months. I ran on 93 Octane exclusively until I could afford the tune and I tell you what. That tune made the single biggest difference over any of the bolt ons I installed.


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you run the risk of detonating when at WOT without tune.

and if you are worried about warranty and your dealer. just flash back to stock before going in. and then take your device out of the car.
 

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Yup just select the option on the xcal4 to return to stock. They can't tell if it's been flashed

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