When do you do a resonator delete you MUST force the valve open. If not, it only opens under hard acceleration.
Quote:
Originally Posted by m3m4tho
I had the resonator delete first and it did not make a noticeable difference so I put the resonator back on and removed the mufflers. It sounds awesome, especially the upshifts and WOL. The pops sound like bangs and louder than my m3 competition I had before this car.
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