Thread: 04 GTP questions, seeking mod advice

I know at least one person that runs SD headers and lives in SLC, not sure if he is catless or not, but I would suspect that he does have a catalytic converter, so either he deleted the codes or his catalytic converter works good enough.

That's good to know. I have 10 months until my emissions are due again, so I guess I'll probably do headers with a high-flow cat and then delete any codes later when I have the means to do some tuning.

Originally Posted by SgtMarshal

I know at least one person that runs SD headers and lives in SLC, not sure if he is catless or not, but I would suspect that he does have a catalytic converter, so either he deleted the codes or his catalytic converter works good enough.

A cheap hi flow cat or a "test pipe" is the way to go if your e testing is an OBD2 check and visual inspection for the cat, a quality hi flow converter is only needed if you need to pass a sniffer test. I had to install a good magna flow HM (high metal content) on my gtp to pass the sniffer before OBD2 check only came in to effect in my area, a universal or cheap hi flow just won't get the job done compared to a stock cat.