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yea i have resonated rennart and catless dp, and its just a touch louder than stock in the upper rpms and deeper and a little louder down low... no rasp and quiote when off the gas, its perfect if you want a tame system imo
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08 135i 6m - 12.1@120.2 2.0 60ft - JB4/Meth - SOLD
09 335i e92 Mtech - 11.9@119 - jb4 iso/flash FBO
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