Was wondering im running a hi-flow cat right now with tanabe exhaust sytem, wanna go either gsr/type r. I have a b20 right now and if i were to get a catalyic converter would the gsr cat be obd2 as well? and what about the type r? and are there huge differences in the gsr and type r exhaust? thanks.

 

The GSR exhaust is the exact same as far as diameter as the ls exhaust. Type R is slightly larger and also has mandrel bends as opposed to crush.

 

what about the cat?