emission question

[JDM onlyy]

Can you pass emissions with a high flow cat on a gsr? Can you pass with a test pipe. I'm pretty sure that a test pipe won't but just checking.

[Barefoot]

yes and no

[JDM onlyy]

yes and no


thanks, cant give ya anymore rep til i spread some. lol

[ksniperfox]

what year? obd2-as long as the check engine light is not on because of cat codes, yes youll be fine.

pre-obd2-it will be considerably harder since the test is performed by actually testing samples of exhaust.


i have a test pipe on my s2k with a MIL fix. i pass.