You choose my next upgrade!
 

Hello everyone,

I have read so many threads about Intakes/Exhausts dynos and I thank all of you for such rich information, that is beneficial to many of us.

I have recently put a Stillen CBE and a Stillen G3 intakes. Now after reading so many threads i want to add some HFC. Now after researching for hours i have found that the two highly recommended brands are FI & Berk. since i cannot decide, i would like to take a consensus and see which HFC do you have and which one do you recommend?

Also, what about CELs anyone having issues with different codes from recent HFC gens (specifically the FI & Berk)?

At this point (after the HFC, CBE, and G3) would it make any sense to upgrade my Headers? (i am not sure about the headers since it will probably add few more HPs after all of the above upgrades).

As always thank you for all your help, and every piece of information you contribute.

I would go with the FI HFC over Berk HFC. I just installed FI RHFC this past Friday and I am really impressed with the sound.

If you want headers, you'll be wasting your money buying HFCs. One or the other.

Thank you for such a quick respond... does the FI HFC sound deep? i am not looking for loudness rather deep sound that goes with my Stillen CBE.

I have found some videos and some sound files online but unfortunately all were hooked up to different CBE which makes it hard to isolate the tone of the HFC.

Again thank you for your help sir :)

wasting my money meaning if i go LTH right? coz I can go Stillen Headers or something of that sort.

Could you please explain? maybe you know something that i dont :)

Thank you for your input btw... I appreciate it.

Stillen headers are garbage. Either LTHs or Z1 headers are the only options that add power, both of which will not allow VQ37 HFCs.

ok so if i do go HFC it will be pointless to add headers. and if i want to go headers LTH is the only way to go for gains.

I agree with you :iagree:, but i will prefer the HFC rout. so you have answered my questions as far as the worthiness of headers with my set-up.

Thank YOU :)

LTH pretty much like running test pipes right?

I also would like feedback on the FI resonated hfc. I love the sound of my berk cbe but don't mind it being a little bit louder.

You can buy the Z1 headers and use 350z HFCs.

LTH for NA engines and Test pipes for Turbo. Correct me if i am wrong but same thing.

FI HFC sounds much deeper imo vs the berks are louder. so depends on taste, i have read many posts about the quality and gains being the same.

but that wouldn't be cost beneficial. coz the gains are probably half of what the LTH would do for the same amount of money if not less.

Seems like if I will be going HFC its pointless to do Headers. Specially since I have the CBE and the G3.

The problem with na cars is that we can never create new power (like most turbos), we are only better managing our system, to revive the lost power. That being said we can probably get most of the lost power back with few bolt ons and after that things will start not making sense!! gain to money ratio speaking.

You forgot Stillen HFC's.

Not true at all. It seems like the Z1 headers/350 HFC combo are in the same ballpark as LTHs for power, and the price is comparable.

My F.I. RHFC sound is pretty effen sweet with my exhaust and an awesome match up. You can go with either the resonated or the non-resonated HFC. You free up torque and power throughout the entire RPM band and your overall sound volume will increase while making your exhaust note much deeper and smoother. I have no complaints or regrets by adding the F.I. RHFC.

Are those any good compared to FI & Berk? the only reason why i ask is for every 10 posts of FI & Berk i get 1 Stillen recommendation.

Would you care to shed a light if you own or know of the stillen to be a better or comparable product?

hmm... i need to do further research on the Z1 and the 350 cats.

Thank you for the tip!!

:tiphat:

To be fair, you're debating parts that will all add within 5whp of each other. Don't stress too much about it. :rofl2:

the question is the sound difference between the Res. vs non res.? any input? why did you go with the resonated?

lol sighhh its funny because what you said is sad and true!!! :rofl2:

HFCs and a tune will run you about the same cost as LTHs by themselves, and you'll get a lot more value out of it.

yah i am absolutely going for a tune after my HFCs, and since that will be my last bolt on, I was debating whether or not to go LTH or HFC.

seems like HFC and a tune will do the trick for me. then ill just work on getting some summer tires.

I'd look into the Motordyne intake manifold as well. You won't gain much, if any, peak power but you'll gain a lot of area under the curve.

That looks pretty nice, but a bit expensive compared to the 500 price tags of those berk and FI HFCs. but thanks you for the recommendations :tiphat:

It's about $500 as well the last time I looked.

its 585 now :S

Nope. Just saying, you missed Stillen.

And a whole lot less in labor to install than HFCs.

oh! yah i did that coz its not one of my options. but thanks for the heads-up :)

why would it cost less in labor?

and what about CEL, no one having issues with that?

Because the intake manifold is an easy swap, and HFCs can take much longer.

hmm... i dont know still leaning towards an HFC tho.

seems like FI is winning 100% here. but i still need to research and see if anyone is having CEL problems! many of the threads are out-dated about this topic and i dont know if that CEL issue has been resolved with newer Gens of HFCs.

It's not an either/or. I was just pointing out that the $85 difference (which is off retail, not what a vendor can get you) may not be as dramatic when compared with the cost to get it installed.

i see your point! i am just sayin i am probably going to stick with the FIs (probably)

Absolutely get the cats. Just make sure you're done adding parts before you get tuned.

yah cats uprev tune and i am all set till my tires are worn out. but thank you for all your help much appreciated.


i am going to probably call FI for more info about the CEL issue. i will post it here anyway just in case someone down the line had a similar question.

If you're getting tuned, who cares about a CEL? That code will be turned off anyway.

The Non-resonated would be louder, but how much louder that I could not tell you. I would suggest that you call Tony at F.I. and ask him what the differnce in sound is. You will get the same hp either way. My exhaust is already extremely loud, but the RHFC gives it a deeper sexier sound in lower RPM's & at a cold start. The higher RMP's would just be insane. I wanted to make the sound even more exotic/sexier.

LOL touché. BUT!!! if i can get it without a code i will be one happy Z driver. :rolleyes:

Any of the HFCs with the "J" extended O2 bung shouldn't have any CEL issues.

lol you killing me!!! thats exactly how i want my car to sound not lound rather a tone to it!!! do you have any youtube videos up for your set up? i am curious and would love to hear what your set up has to offer!!!!