Peace be upon you, I have an electronic muffler catback from Max Power company. Fully custom-made from the catalytic converter to the original outlets "two exhaust outlets". I bought it for 3800. Used for 7 months with light use, no backfiring or misfiring or anything. It was installed on my car, and I haven't removed the chip or programmed it. You are welcome. Bids above 2000.