Pypes Exhaust CVM10K 1986-2014 Mustang High Flow 2.5" Mini Catalytic Converters Ceramic Substrate High flow catalytic converters with ceramic substrate Catalytic converters are required for vehicles to be street-legal in most areas Substrate is rated at 300 cell count per-inch; Sold as a pair Fully polished T-304 stainless steel Not for use or sale to the state of California