Is he saying ditch the headers or dump their tune if it has one?
Anything from them is utter crap. If they did do work on it the tune is probably bad. Back in the day I went with him to SVS. I made him run far far away. There is so much bad about them on the web. If it's only the headers, they only crack or burn the car, so that's your call. The tune is not something I'd keep.