ok... i have a 96 gsr which is about to receive a 2000 usdm itr swap. i am looking into purchasing an aem cai, dc sports jdm 4-1 header, and carsound 2.5in cat. i was wondering if this would bolt up to my dc sports cat-back exhaust for the gsr, and would i have any o2 sensor problems with the high-flow cat or header? ive also heard the cat needs to be modified and i might need a flange and gasket for the header. anyway, any advice or help with this would be great. i am open to suggestions if anyone has any... thanks

 

Yes, that setup will bolt up to your current cat-back, assuming you have the cat built to the proper length. My suggestion would be to contact Dave at SMSP and tell him the setup you're running. He'll provide you with a custom-built Car Sound cat that will simply bolt-up directly between the JDM header and your GS-R exhaust.