Here's my 03X with some ebay type headers. NOTE: You might hear a whistle that was from my old stock muffler, ignore. Have since replaced with another OEM style muffler, whistle gone.
They are still on the car almost 4 years later and doing well. However, you will have to deal with a CEL in most cases (P0137 i think mine was). In mine I had to back the downstream o2 sensor off with a sparkplug antifowler type device marketed as an 02 sensor spacer, which has since rusted out and broke off stuck in the bunghole - so yeah, typical car mod stuff.... i thought the car felt a bit peppier after the swap as well, could just be me though - either way the car will never be fast but has some pep.
They are still on the car almost 4 years later and doing well. However, you will have to deal with a CEL in most cases (P0137 i think mine was). In mine I had to back the downstream o2 sensor off with a sparkplug antifowler type device marketed as an 02 sensor spacer, which has since rusted out and broke off stuck in the bunghole - so yeah, typical car mod stuff.... i thought the car felt a bit peppier after the swap as well, could just be me though - either way the car will never be fast but has some pep.