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Discussion Starter #1
Anyone have experience with using an sct x4 (without custom tunes) on a stock truck

I have a 4” lift with 35x12.5x22’s. The truck feels slow, groggy, delayed shifts. Wondering what to expect if I use only the tuner and then go with custom tunes later.
 

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You will wish you had gone with custom tunes to begin with from the start. Just go custom.
 
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