Originally posted by Mike99
Old post I know, but would this mean that a stock SI Catback would bolt up to an EX? I thought the EX had smaller Diameter piping like 2" VS 2 1/4"for SI or something like that.
i dun think theyre the same, application lists always set ex and si apart.
again civicsiracer/"louie" would know for sure, hes owned both cars.