My current mods include intake, catback, downpipe, and PFC with base map. I was recently having boost problems which were due to a clogged precat. My car has 42k miles. I assume if the precat was clogged, my main cat is probably starting to clog too. I'm wondering if I should get a high flow cat.

Unfortunately, I have state inspections so a midpipe is out. Shouldn't a high flow cat pass an emissions (sniff) test? Suppose it does just fine for the sniff test, what about the visual inspection... might I fail just because it is not the OEM cat?

Will I be safe to run the PFC base map still (after adding the high flow cat to my current mods)? If I got it dyno tuned, would my horsepower gains be significant?

Lastly, there seems to be some debate in the threads I have read as to whether or not the gains with a high flow cat will be noticable. I've seen members ask what kind of HP gains can be expected, but have not read any answers. Anyone know?

Thanks,
Tony Alvarez
93 Base