How are these exhaust systems different?
The vermiculite is sold at gardening stores, the flour at health food stores (you really don't need the organic), but the organic is available at whole foods and like stores.
I think its merely the tone of the exhaust note. One might be higher pitched and the other might be really deep sounding. I had a jeep with a flowmaster exhaust that sounded super deep and rumbly while another exhaust for the same jeep had a higher pitch to it and it was louder.
