Hey I'm looking around the net for some HFC's, and I'm looking at Fast Intentions High Flow Resonated Cats, but I just can't seem to find much feedback on them at all... It seems like the best of both worlds, HFC's and resonators to help keep down some drone and volume.. is the power still there? Thanks

 

out of all the breathing mods on my car, this was absolutely the most powerful one (acording to my buyy dyno). It feels as if it truly gave the car a significant improvement in power.

 

Damn...$620 for HFC's. Why not just get ART pipes?

 

I was ironically reading up the big thread about them earlier tonight... and I saw you're a big fan of MD in general. My only issue with them, would be the gas fume smell I guess. I know HFC's are illegal just the same, but at least its a better argument then test pipes... I'm worried about rasp and drone as well. I am looking for power for sure, but definitely need to keep up the audio appeal. IMO i'm favoring the sounds of Stillen of FI for there exhausts, and just getting some info on Cats... There isn't that much of a difference between the FI HFC's and ART's, just abit more with the latter of the two...

Please correct me if I'm wrong.

 

I was ironically reading up the big thread about them earlier tonight... and I saw you're a big fan of MD in general. My only issue with them, would be the gas fume smell I guess. I know HFC's are illegal just the same, but at least its a better argument then test pipes... I'm worried about rasp and drone as well. I am looking for power for sure, but definitely need to keep up the audio appeal. IMO i'm favoring the sounds of Stillen of FI for there exhausts, and just getting some info on Cats... There isn't that much of a difference between the FI HFC's and ART's, just abit more with the latter of the two, and the fumes, right?...

Please correct me if I'm wrong.

 

I understand about the fumes, some people can't stand them, I don't mind them myself. If you're worried about fumes, then yeah, F.I. HFC's are the way to go. I used to have them before my ART pipes, but the non-resonated HFC's. There's actually a pretty big difference in performance between the two, I gained 12+whp on top of my hfc's by switching my ART pipes. Obviously a straight pipe will flow better than any cat.

To break it down between the resonated HFC's and ART pipes:
- Both will reduce droning and rasp. I can't speak from personal experience about the HFC's if they do actually do this, but I'm assuming.
- Both are illegal (at least here in Cali).
- Both cost about the same.
- Both are great quality.
- Both will give you good gains over the oem cats.
- ART pipes will give you more proven gains than the HFC's.
- ART pipes will smell.
- ART pipes are actually quieter than normal HFC's, but i dont know if they'd be more quiet than these resonated ones.

It really just comes down to the fumes.

 

Hell of a write-up, thanks so much. Now I can't say I've actually smelled the fumes from test pipes though. Is it just a gas smell, or distinctly different?

I love the sound of the power gains of the ART's, I was looking at dyno's earlier.
- Actually the sound of the ART's and the Shockwave V2 setup..
And if they're the same or lower in volume, that's awesome.
Do you get the fumes inside of your car alot? And is it a very obvious smell if you're around the car.. aka.. cops?

 

In fact.. i just noticed it was your thread about the comparison on the FI HFC's and and ART's... good thread, great movie, awesome sound.

 

The smell is sort of unique. Imagine sitting right behind your exhaust tips while the car is running, but amplify that smell a couple times, lol. As the driver, you only smell the fumes when you're at a stop or come to a stop with the windows down and the fumes catch up to you. If you drive behind a car with test pipes, you'll clearly smell it. I've had my ART pipes for a while now and havent had any trouble with the cops. Of course, I take precautions if i see a cop anywhere behind me, such as not revving high, and changing to a different lane so he's not directly behind me. Might also depend how strict cops are in your area.

Thanks, heres a better video of my setup. Though it gets too loud sometimes for the camera at the high rpms lol. And although the exhaust sounds pretty loud from the outside, it's surprisingly not loud in the cabin.

 

To find Fast Intentions exhaust all ya gotta do is Google, all the information is there and they have clips too....
Gary

 

Thats true for the FI HFC's... but I'm trying to find out more information about the RESONATED HFC's... I can't find any audio clips or dyno results at all...

 

Are you referring to FI resonated test pipes? Or FI HFC's? As far as I know there is one or the other and no such thing at FI resonated HFC's....

 

Also, if you want the HFC's they're available through some vendors here in the marketplace for $500.

 

^ Yeah there is. Check their website.

 

And also, ART pipes will not pass smog.