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800 Posts
Eric, Banks is advertising a new 4" downpipe for about $150.00. My question is does the downpipe make that much of a difference? I am still running the stock system as my wife still hasn't gotten over what I did to the previous 6.0L in the old Chevy. Boy did that truck sound good!! Also, do you have any good info on a free flowing replacement muffler?(Quiet one.)