For those with Berk HFC's, Questions
 

How do you like it? How are the gains and the new exhaust note with them? I just placed an order for a pair and was just wondering how the people like it, (I've done some searching around that it does have a decent gain and a less noisy exhaust?)

I think it is MORE noisy...

It opens the pipes up more..

Def feel alot of gains, and the exhaust gets louder and a lil raspier.

One thing thats been bugging me, choyboy, and a mfn o, is when you accelerate and then let off the gas, when the rpms drop below 2k theres a really annoying rattle. We all have it. Mad annoying.

That sucks, Ever looked into fixing it? Is the Rattle really loud and annoying?

It's almost sounds like a blow off valve. Lol I love my berks!! Makes a difference

the "blow off valve"-like sound is normal. even the stock exhaust makes that sound, however with aftermarket piping/HFC/etc the sound is amplified and thus you can clearly hear it even inside the car.
with the stock exhaust you will probably hear it if you go down under the car and let someone slightly rev it :)

Thanks for the inputs, Keep em coming, Kyle@importpartspro already packed up my shipment and its with ups already, Only ordered it a few hours ago.

blow off valve???? it doesnt sound like any BOV ive ever heard lol

Haha okay maybe I was exaggerating a little when I said almost. Lol nevertheless, I like the berks. :)

thanks all..i have a pair sitting here...and i am sure the raspyness would come along but i look forward to putting them on....

Had stillen gen 3 intake and Berk HFC, i put down 300 to the wheel on 93 octane.

No way, I have the stillen 3G also.

here you go

http://i44.tinypic.com/zpn2g.jpg

^ one of these days, my dyno sheet will look like that =)

I love the HFC's i just had them installed today and i couldn't stop driving around aimlessly rofl.

Pros - Makes the exhaust a little louder yet sexy, Definitely feel the gain's, Definitely worth the money

Cons - 2nd cat was pretty hard to get out but it came out with some torching, other than that nothing else, Odd Odor i had after the first start up then it went away after i kept driving, Little weird noise as Stoof mentioned up there^ But its no biggie, i could live with it.

Once again, Their worth every single penny.