A buddy of mine owns a 98' Prelude. He is trying to sell it but the previous owner had a high flow cat on there and now he cant pass smog to sell the car. Do you guys know if the prelude cats are the same as the obdII gsr/civic cats? Im trying to help him out but I am not familiar with preludes...Thanks in advance.

 

sorry its off topic, but what else does your buddy have on the car? I just got a carsound cat myself so I'm a bit concerned.

 

the high flow cat and a cat back system. It wont pass smog. Someone help out my friend. Thanks.