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Haha, Dave, I straight piped mine for awhile but after starting my business I realized how annoying it was to others and wondered what folks would think as I drove away from a bid. I put a pretty open muffler on it to take the edge off. The engine is the noisy part anyway, too noisy when I pull...

I remember that thread but never tried it. Now i'm reading that 1oz per gal is ideal for Cummins. Might have to pick up a gallon today and try it. The thing thats most interesting to me is they say it really quiets these rattle traps down