[VADER SS L99]

Originally Posted by Marc ss

So an X- pipe would take the place of the resonator? What is VVT?

Your going to want to put in a Magnaflow mid muffler which has a x pipe built into it or your going to want to get a conventional X pipe with 2 rear mounted mufflers of your choice.

VVT stands for Variable Valve Timing. It allows advances and retard in camshaft timing to give you the best low end torque AND max RPM horsepower. Your stock L99 has this function. Getting a VVT cam keeps this instead of deleting it altogether. Either way your going to want to get rid of the AFM and its weak lifters.