Oh my. I have a stock 350 4 barrell in my 77 c 10. I also have stock manifolds and 40 series flowmasters, with rear dual side exits. The entire system is only a few months old now and is not very loud. Its the loudest at 30 mph, and when taking off hard. Its disappointing its so quiet. I love the noise just want it to be deafening, and its not. Anyone know why its so quiet ?
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