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K&n typhoon + high flow cats = tune?

From what I understand a Stillen gen 3 and high flow cats u need a tune. I thought I read the k&n typhoons and high flows you donít have to

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Old 03-08-2020, 09:21 PM   #1 (permalink)
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Default K&n typhoon + high flow cats = tune?

From what I understand a Stillen gen 3 and high flow cats u need a tune. I thought I read the k&n typhoons and high flows you donít have to have a tune?..
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Old 03-08-2020, 09:44 PM   #2 (permalink)
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The rule of thumb is:
3 respiratory mods, you need a tune.
Example, intakes, hf cats, cbe, or; intakes, long tube headers, cbe.
For 2 or less breather mods, the ECU can adapt. A tune can help, but isn't really necessary. (A tune can help an unmodified car, as well.)
(Oh, and the Stillen will see more gains, compared to the K&N's. But you knew that, dintcha? )


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Old 03-09-2020, 05:48 PM   #3 (permalink)
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Knew that about the gen 3. Yes so I have the typhoon the f.i. Cbe and if I get the cats Iíll need a tune. How soon after that final mod should the tune be performed. Will the car be hurt if itís not tuned Right away ?
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Old 03-09-2020, 08:35 PM   #4 (permalink)
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For normal, everyday driving you should be fine until you get tuned. I wouldn't get too rambunctious with it, tho. The issue is leaning out under WOT. Good way to cook the top out of a piston.


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Old 04-08-2020, 09:49 PM   #5 (permalink)
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Rather than starting a whole new thread I just figured I would try and ask on the end of this. If I got my third resp mod, would I be ok for (roughly) an hour drive on a highway to get to a shop tuning me? Just wanting to know what kind of range I have without hurting the car.
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Old 04-09-2020, 08:18 AM   #6 (permalink)
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Same answer. Don't go racing that id 10 t in the STI, and you will be ok. The ECU will start trying to adapt, so it might run a bit different than your used to. Just be gentle with her.


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