racefacefx... when i said bolt-on i meant that there was no cutting or welding needed. do u have the borla with random tech cat? where is ur answer based?
on a 2006, the header and cats are one unit now, where the older ones, the header and cats were seperate. u need these to be changed at the same time. the dual converter on the random will most likely not throw a CEL. my car didn't throw one with the header. the stromung cat will throw the CEL. if a TWE EL header is added to either, there will be CEL all the time.