88 decibels or less at 4000 rpm. Uses stock springs and hangers.Flo-bench tested for back pressure. 2003 - Legend SE 800 SDI. 2003 - MX Z Renegade 800. 2002 - MX Z Renegade 800. This item is in the category "eBay Motors\Parts & Accessories\Other". The seller is "generationmx-specs" and is located in this country: US. This item can be shipped to United States.