Parts & Accessories Spare parts Coby Corsa catback with JBA resonators and electronic valves (without controller). The condition of the catback and resonators is as shown. There is welding in some areas of the catback, but there were no leaks before removal. The reason for selling is that I bought the car and had a new catback custom-made for it, simply for renewal purposes. Selling to the highest bidder, no fixed price, and bid reasonably.