I am happy to say that I am loving my Berk HFC's. I have a quick question , lets say when your in neutral and your giving a rev up to 4k rpm and let go of the gas do you guys get a hissing noise near 1k-2k rpm or is it just me? I mean the product that Berk Made was excellent, but I am wondering is it because I am using Berk Hfcs, on my stock exhaust or does that have nothing to do with it?

 

only problem i have is it throws a CEL. does yours yet?
otherwise, they're fine!

 

yes there is ,and as far as i know its normal its not a leak .

 

The hissing is normal. Almost every setup I have heard with test pipes/metallic cats has the hissing sound..

There is nothing wrong with the cats. The hissing sound is a by-product from removing your factory catalytic converters..

If your Berk cats are throwing a CEL, then I suggest you get the CEL checked and see exactly where it's coming from.. Because Berk's should not throw CEL's.. My CEL has never came on since I got these installed 5,000 miles ago.

 

Not sure of the hissing sound, but my Berk cats don't throw CELs. When I first installed mine, I had a CEL on, but it's because I damaged one of my O2 sensors during removal. After I replaced the sensor, there has been no CEL. I just wish they would have put the extra bungs in front of the cat instead of behind. Other than the extra bung placement, I'm pretty happy with mine.

 

are you running a stock ypipe? that sounds more like y pipe hiss than anything. where it leaks around the flex tubing.

 

No probs here. TPS

 

yeah mine is a stock y pipe , and mine doesnt throw a CEL. I am thinking about getting the motordyne XYZ pipe it should sound sweet with that set up. Thanks alot guys , I just wanted to know if it was normal

 

Yes, hissing is normal.

 

sweet I feel better now thanks!

 

NORMAL ANNOYING IF U PAY ATTENTION TO IT BUT NORMAL HAHA!!!

 

Gee tahnx for starting this thread I installed mine on Saturday and heard the same thing. But I guess its normal. No to figure out my hesitation at 2k and WOT 1st gear..

 

do you know so!! ,i mean did you hear this setup or guessing ??
because i`m looking for clips for that setup . i think it would be nice deep Z sound and exotic in WOT

 

im just guessing but i think it should be sweet , and I just bought the TurboXS exhaust