Nissan 370Z Forum - High Flow Cats

Nissan 370Z Forum (http://www.the370z.com/)

- Intake/Exhaust (http://www.the370z.com/intake-exhaust/)

- - High Flow Cats (http://www.the370z.com/intake-exhaust/8441-high-flow-cats.html)

No problem with CEL on my Stillen HFC's. I have 2000 miles on them so far. I chose them basically I got a deal I couldnt refuse from Stillen at the time by buying thier power pack for the 370. I didnt like the sound at first but after putting some miles on the car with the new exhaust it sounds totally different now. The rasp that it used to have has now all but dissapeared. It has a very deep tone at low rpm. It definitly sounds modified.

Quote:

Originally Posted by BerkTech (Post 191755)

Here's a quick comparison chart. :tup:

Whatever feature you could possibly want in an HFC, Berk has it.

http://i183.photobucket.com/albums/x...risonChart.jpg

Quote:

Originally Posted by BerkTech (Post 191765)

The O2 extensions help with keeping the CEL light off on the HFC applications but have been met with only limited success in the test pipe application on the 370Z. However it does work well on the older 03-06 350Z's. The HR motors have much tighter control over the emissions system with an entirely new monitoring algorithm that's much harder to crack with mechanical fixes. Darn cars are getting smarter and smarter. If OBD III, aka "Big Brother", ever comes to fruition we are all in for a world of hurt....

We've had the extended O2 bungs on our HFC's and test pipes since 2005, long before it became "standard" for everyone else.

Well there you go. I don't think anyone could have explained all the Pros and Cons any better than that.

Berk HFC's FTW! Love mine.

My only issue is the efing hiss

Running Berk's, no issue's here!

Quote:

Originally Posted by FuszNissan (Post 226265)

My only issue is the efing hiss

I actually kinda like the hiss, lol.

I'm curious about the hiss everyone's talking about. I don't hear any hiss can you guys point to where the hiss appears to come from? or is it associated with the stillen Gen 3 intakes?

Quote:

Originally Posted by AAM_COMP (Post 179435)

Hello,
We at AAM been using 200 cell HFc on Multiple 350Zs, G35s, G37s and now few 370Zs. We have not had any problems with our HFC throwing CEL codes.
Check out our site, AAM, HKS, Greddy, TEIN, ARC, JWT, Eneos, Volk Racing, Carbonetic, Motul

and also search toohip on this site, he has our exhaust and HFC on his 370Z.
Hope this helped.
Thank you!
-Jae

I also have the AAM HFCs with their True Dual Exhaust installed at approximately 1800 miles. No thrown CEL codes to date. Love it! Oh by the way FWIW, before I had the exhaust and HFCs installed I contacted my Nissan Service department service manager to ask him if there was anything warranty wise that I needed to be concerned with with new HFCs and Exhaust. He indicated that as long as the installer used the stock 02 sensors that there was no warranty concerns. I say this only because of what he said. This may be different from others in different locations but I wanted to at least share that with everyone.