Yep, I had mine for 3 weeks and sold it, terrible drone and resonance between 3k-4k RPM. Greddy explicitly states EVO GT is designed for Turbo cars, and it shows, the 3" piping creates too much resonance in an N/A car.
You best bet is to run OEM catalytic converters, modify OEM Y pipe by welding couple of resonators and install that instead of Greddy Y pipe. Or just sell it to someone else who loves drones.
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