My FI with 12 inch resonators has a good volume to it and Im adding HFCs so it will get even louder. I think Red370 has Berk HFCs and Stillen CBE and I think mine is louder than his without the HFCs on mine yet and will be with them on for sure. So if loud is what you want I think FI can get loud but in a good way.
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2010 LS3 C6 Silver coupe corvette
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