I was looking at putting in Stillen High Flow Cats on my G 37 X coupe and i was wondering if anyone else had done so also? Trying to find out if the High flow cats will set off sensors causing my check engine light to come on?

 

I have had the STILLEN hi flow cats on my G for over a year and haven't had any problems with them...

 

vinny ten racing just installed some berk hfc's into camer25's G37x coupe-- sounds great!

 

IF ti is installed right not CEL should go off

 

I get codes all the time bank 2
p0430

and I have 2 non foulers welded together.

make sure you install gaskets.

I have a ses light every 2-300 miles.

 

There are TONS of HFC threads... Use the Search function and you will find more than you have time to read.

 

I recently put in Invidia High Flow Cats and a full Invidia Gemini exhaust in my 2009 G37X 7AT coupe. Thanks to No Limit Motor Sports the exhaust went in nicely. The passenger side between cat and X pipe had to modified to go around the output shaft of the AWD. if you see it, you would never know it was done. Find my other post for DYNO before and after. A few weeks before that i installed Stillen Gen 3 Long Tubes.
i am now at 283.9 HP on the Dyno.
last mod will be Uprev, calling them tomorrow. Maybe tomorrow i will post a sound clip and video, also have a sound meter for the DB's.

PS: No Codes
my recommendation would be Invidia HFC or Berk HFC, Risky Guy has the Berks, he can tell you more

 

I've got berks hfc. No problems here. Very happy with them. Also check out Fast Intentions.

 

I have Invidia HFC's on the way. Did you install non-foulers? From the pics it looks like the sensor mount is pretty short (close to the exhaust stream)

 

no i did not install non foulers, sensors are exactly in the same location as stock

 

And no codes or CEL? thats good to know.

 

check engine light came on once, i cleared it and has been off since, i think it was caused by the initial startup with new cats and exhaust

 

Do you have to re-tune ur cats when u get HFC? Can you just swap out ur old cats with HFC and be ok?

 

you will need an ECU retune to get the most out of it. HFC allow much more flow over stock so your AFR might suffer.

 

Berk HFC's and I have a code but haven't gotten around to installing non foulers yet.