Not Ranked
Have auger insert on Bennett car and they are quiet. They cost hp, friends have said up to 50 hp. CSX car has straight glass packs and they are loud but with 10 1/2 to one compression and dynamat in doors, noise is ok from inside the car. Not meant to be funny but have twin turbos on sand car with no mufflers, its very quiet. Quiet enough that you don't need headsets to talk and you can hear turbos chirp.
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