i have 2016 5.0 with the roush phase 1 supercharger 670 hp. The car comes with an 85mm pulley. I have an 82 mm pulley. Has anyone changed to an 82mm pulley w/o retuning the car? Let me know your thoughts on changing the pulley w/o retuning.
Pulley Swap
- Thread starter malibu78
- Start date
You absolutely have to get a new tune.
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