Glad things worked out for you. I was the one that told you the stock catback was 2.5 because it is, my '89 is bone stock at the moment, and it is 2.5 stock, my cousin (UnderPressureGT)'s was 2.5 stock when he bought his 3 years ago. When I was talking to one of the Mustang Specialists at VALLEY PERFORMANCE in Belleville about doing my exhaust and the mufflers I ordered had 3'' inlet and outlet so he said I would need Exhaust Adapters since the STOCK cat-back is 2.5''. So maybe yours wasn't stock and it was 2.25, or maybe it really is 2.5 and someone made a mistake. My cousin that I mentioned above had Dynomax Race Bullets that fit right up to the 2.5. I don't want to start anything by saying this, just stating what I know to be fact. Once again, glad to hear everything worked out for you. Later, Jeff.
