i have a set of very low milage C6 ZO6 mufflers that came off a friends car,i have cut them open took out the muffler packing and clam shelled the internal baffel's and welded them back up.you would have a hard time seeing where they have been cut the welds were ground down and the muffler body has been painted black to match the factory dusting of black paint.i would like to keep a set here on an exchange basis,so the price for this set with your core's sent back to me would be $500 plush shipping.if you have no cores they would be $700 plush shipping.the best way to reach me regaurding this would be my e-mail danimal-76@hotmail.com