Quote:
Originally Posted by NJD022588
Good question. In addition, if shimming is sufficient, what is the advantage of a jet kit?
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R&D on a kit that was dynoed to give you a desired result. That and the proprietary needles they provide that you can adjust in 5 steps to tune the midrange.
They also give you a selection of mains so you can dial in the full throttle power to your particular location. Some jet kits even provide you new pilot jets to richen up the idle mixture for a smoother, more powerful low end/off idle response.