damn . . i think my 8 month old BERKS HFC have started ratteling . . . gonna have them checked out soon and report back . .

 

They are GTM.

 

That's one of the reasons I won't be putting them in..other is sound.
I can live with 10-15 less HP for not having to deal with those issues.

 

You aren't running a nismo Y-pipe are you? If so your HFC's may have cracked. I hope everything is good, let us know.

 

Berks HFC , Fujitsubo y pipe and muffler

[youtube]-wBMQa5Vapk[/youtube]

 

wasnt the cracking issue for the non HR cats ? are the HR cats also affected in the same way ? ?

 

^ The nismo Y-pipe does not have enough flex... I was one of the first to find out, completely trashed my berk hfc's

 

Same issue, not enough flex. I'm running the Motordyne XYZ pipe, it seemed like it had lots of flex when I installed it. I'm really happy with my setup, maybe you could look into a different Y-pipe.

 

checked for cracks, but didnt see any . . also the bracket welds looked fine . . here is a vid of the rattle . . . also the issue happens only when car is driven for 10 mins . . never when its cold

http://www.youtube.com/watch?v=jOEOkEnZjMQ

sorry the lens was foggy

 

Im awaiting my resontated XYZ pipe to arrive from State side ... then going for ART pipes, should have my Nismo system sounding pretty sweet

 

Had my berk test pipes for 9 months without a single problem.

 

I have AAM HFCs. Ever since they were installed there has been a lot of popping and what not from the exhaust. Is that normally characteristic of HFCs? If so, is there a better brand I could get?

 

Somebody! Help i just got berks hfc's today at my house, my current setup in my 2008 350z hr is skunk2 true dual exhaust and fujitgo dual intakes, i have not yet install the hfcs..... If i install my hfcs will i get a CEL? Or do i need a tune? If so what kind of tune ? Please PM me and tell me any info that would be helpful. I currently do not have a cel on exhaust and intakes... I do not want a cel, soo any help would be very thankful of you's! PM any info thank you!

 

I have the Berk non resonated test pipes on my 2007 NISMO. The power gain is well worth it. but BEWARE! if you still have a stock exhaust, DO NOT install them until you get an exhaust system on. the rasp is unbearable and it will turn your Z into a Honda... but when you have an exhaust, its a beautiful thing!
here is a link to what my car sounds like with the M2 true dual exhaust.

<iframe width="420" height="315" src="http://www.youtube.com/embed/RZNkebDyOVs" frameborder="0" allowfullscreen></iframe>

so far, im not regretting the test pipes. but i did make it to 5k miles without a SES light coming on.... but now it never goes away... but im living with it.
also, my upper gaskets on my test pipes BOTH formed a leak in the exact same place... odd. ill have to replace both of the gaskets.

 

I've had the Kinetix HFC's on for about 2000 miles and have not got a CEL yet...

<---- *knocks on wood*

 

1 year with my BERK test pipes, no problems yet!
I'll make a video tomorrow how it sounds from inside/outside.

 

what would b the best ts/reson. ts/hfc...for Greddy ti-c true dual (3'inch fyi)

 

Is anybody running a Nismo S-Tune exhaust with FI Resonated Test Pipes?

 

old setup ->
Stillen Headers
Stock Cats
Nismo S Tune Cat Back

-Stock cats cracked, Y pipe flex pipe is damaged
-Everything lined up perfectly

mutt setup ->
Stillen Headers
CNT/ERZ 200 Cell HFC
Stillen Y Pipe
Nismo S Tune Mid
Nismo S Tune Muffler

-notes
- HFC brackets don't line up with brace
- Either Y pipe or HFC are short in length because there was a 3/4" gap
- I am waiting for HFC to crack and will update when they do

 

Has anyone here paired the ART test pipes with HKS Hi Power exhaust?

I'm going to ditch my Berk HFCs for the ART pipes very soon. I think my Berk HFCs have about 3-4K miles without any issues yet.