Used for a few hundred miles. Decided not to go with E85 so I no longer need these for my build. Comes with mini cats and O2 extensions to fool the car and not trip a CEL. The mini cats that are installed were all that was needed but I will throw in the extension just incase. Thanks to the EPA these are discontinued and no longer available from Stainless Works. $380 shipped. Paypal only. BUYER PAYS PAYPAL FEE!