Are all hi flow cat the same size in lengths? I don't know which cat to get so it will be a perfect fitment for my cat back exhaust? lets say i have a 95 gsr motor in a 99 civic hb, do i get a civic 99 cat or do i get 94-95 gsr cat?

 

Contact Dave at SMSP. Let him know your setup, and he'll build you a Car Sound that is the correct length. At most, you might just have to take a measurement for him.