More than just a shiny exhaust tip, this is a special DynoMax 6-inch stainless-steel mirror-polished cooling tip for the 2011 Chevrolet Silverado/GMC Sierra 2500/3500HD with the 6.6-liter diesel. The finishing kit preserves the stock tip's diesel-exhaust cooling function during the engine's diesel-particulate-filter regeneration cycle. Itcomes with a 14-inch extension pipe, cooling tip, and stainless-steel band clamp. $90.