LexBrett

Hi All;

For a while now I have been considering removing my OEM cats for Magnaflow High Flow Catalytic converters. I also noticed that MrMark is running these. Here are the pros and cons of this mod, please feel free to chime in:

Pros:
Increase airflow for more power
Inexpensive
Eliminates greatest restriction in exhaust system

Cons:
Possible trigger P0430 and P0420 code
Loss of backpressure could reduce power (?)

Anyone have anything else to add?

SlvBullet

iTrader: (8)

Are you planning to track your SC? You won't really 'feel' most of the performance mods unless you're over 60 mph on the curves heading to 110+ on the next straight ... You might want to try autocross though - you will really feel suspension mods around tight turns on slomons. Lower speeds mean more safety and less wear an the care compared to a road course.

LoveThatV8

iTrader: (1)

Interested in this being the gs has the same as the sc's cats. Anyone have this w/o the CEL? Anyone running it with O2 defouler/simulator? I live in Cali, laws are so uptight with smog emissions I figured to ask.

LexBrett

Yes I run O2 simulators. Headers installed and then CEL. Put in simulators (spacers) and no CEL..😀

LoveThatV8

iTrader: (1)

In other words, before u got the headers... You got O2 simulators on aftermarket cats and had no CEL?

I would like to know your set up my friend and what brand and so fourth.

LexBrett

No, sorry for being unclear. I got headers installed and then used simulators to make CEL go away. Now I'm considering high flow cats