Hi-Flow Cats too loud!

Minicobra1 · 08-21-2009, 08:32 PM

Quote:

Originally Posted by CrownR426

I wonder if cops look at these launches and try to find out where it is.
lol, hope none of us get caught!

Hope not

That was in a very deserted industrial business park on a Sunday, I looked for a place with no cross streets and on a cul-de-sac. Not saying that this is a safe thing to do on the street, but I did put some thought into it.
I've seen others shooting video, and it looks like there right in front of their house in a residential section

Try and be as safe as possible out there and use discretion.

Minicobra1 · 08-21-2009, 08:39 PM

I think the Berks sound great, probably not quite as loud as the Stillen/Berk combo.
I've got Nismo/Berk at the moment, and it's a little too mild for me. Sounds great when you get on it, but I don't want to have to drive my car fast all the time to get the enjoyment of the engine growl. On the other hand, I don't want something that is going to drone or attract too much negative attention. Hoping the Berks CBE will be the solution.

I don't want to give up my Berk HFC's they have definitely made the biggest difference in performance gains so far.

WShade · 08-21-2009, 02:54 PM

"mattkim85" in CA already got pulled over for his being to loud. Check the classifieds.

JB1 · 08-21-2009, 03:32 PM

What about stock exhaust en HFC's? That is the setup I am going for. From the video's DDM posted, it sounds good, not too loud and it should yield nice performance gains.

blackbird · 08-21-2009, 05:55 PM

I have the Stillen CBE, HFC, Headers, Gen 3 intake. car sounds like a Z. Cruising at 3000-3500 RPMS, sound is not harsh. Easy having conversations etc. In the hurry-up mode, it has a distinct throaty sound. Course this is comparing to just the Stillen exhaust since I had them install on day 3 of owning the car. Happy driver and local Law types have not stopped me. But this is Live Free or Die country. Or it could be I'm losing my hearing, but who cares.

One_Quick_Z · 08-21-2009, 10:31 PM

I like the loudness under WOT that is why Im going to get Test Pipes when I get Exhaust

I loved the sound of my Borla With APS test pipes, Megan Racing Headers on my 06 350Z

DAN

tstrick9 · 08-21-2009, 10:37 PM

I thought it was against federal law to removing functioning cats even if they were replaced with other cats.

kannibul · 08-30-2009, 01:03 PM

Quote:

Originally Posted by tstrick9

I thought it was against federal law to removing functioning cats even if they were replaced with other cats.

Yep, it's also illegal to change out motorcycle exhausts,

john370z · 08-22-2009, 08:30 PM

OK OK OK.. I did it today! I took off the Berk HFC's!

Oh my God!

I love my car again!!!!!

It sounds about 75% less noisy.
100% less raspy!
100% less drone!
and still has a sporty sound at the upper rpm range.

To be honest, I drove home with a smile on my face the entire drive home from the exhaust shop, and that's the first time that's happened.

If anyone is one the fence on this one. I hope this pushes you in one way.

Good luck to all!

2fast4thelaw · 08-29-2009, 10:50 PM

I havent pulled my cats yet and I may not. I just got my car back from the car audio shop and they put 120 sq ft of sound deadning in the car and it is sooo quiet inside. I can't hear the anoying drone anymore. Its a night and day difference not to mention hardly any road noise now.

I can live with HFC now. Without the sound deadning, I was ready to yank them like "John370z"

MacDaddy · 08-30-2009, 12:07 AM

2Fast, not to get off thread but other than the doors, where did the shop install the material...I'm guessing dynamat??? Fixin to do mine

thanks

mac

2fast4thelaw · 08-30-2009, 01:54 AM

Actually I used Rammat. Its not only cheaper but its better. I bought 2 rolls which are 62.5 sqft for about a $100.00 a roll. Plus I bought 6 yards of ensolite foam barrier that is glued to the Rammat.

RAAMaudio

I had it applied double layer in the trunk floor and wheel wells and yes, both doors. It was very well worth it as the car is amazingly quiet inside.

I had the entire interior of the car removed. I am adding pictures of the process on the Audio thread but there are a few there already.

semtex · 08-30-2009, 05:32 PM

Laws are made to be broken.

kannibul · 08-30-2009, 06:45 PM

Quote:

Originally Posted by semtex

Laws are made to be broken.

That's kind of my point to a degree.

I'm thinking I'll swap cat-back first. If it's not loud enough, I'll get an HFC with resonators (both of them Fast Intentions)..

I do not want a drone/resonance in the cabin at any RPM. I just want it to sound as powerful as the engine is

08-21-2009, 08:39 PM	#2 (permalink)
Minicobra1 A True Z Fanatic Join Date: Nov 2008 Location: Orange County, CA. Posts: 1,205 Drives: 370Z Tour, Spt, 6mt Rep Power: 645	I think the Berks sound great, probably not quite as loud as the Stillen/Berk combo. I've got Nismo/Berk at the moment, and it's a little too mild for me. Sounds great when you get on it, but I don't want to have to drive my car fast all the time to get the enjoyment of the engine growl. On the other hand, I don't want something that is going to drone or attract too much negative attention. Hoping the Berks CBE will be the solution. I don't want to give up my Berk HFC's they have definitely made the biggest difference in performance gains so far. __________________ 370z Tour\| Spt Pack\|Navi\|BERK CBE\|Berk HFC's\| Eibach Springs\| Hotchkis Sway Bars\|SPC Camber Arms\|15mm Ichiba Wheel Spacers\| 19"Factory Nismo Wheels-Matt Black\|Stop Tech Rotors\|TWM Shifter\|3M Tint\|Black Fangs\|Black Rear Valance\|JDM Fog Light\| MY BAND-www.myspace.com/petroleum Last edited by Minicobra1; 08-21-2009 at 08:42 PM.

08-21-2009, 02:54 PM	#3 (permalink)
WShade Track Member Join Date: Jan 2009 Location: San Antonio, TX Posts: 765 Drives: 09 370Z T/S/N Rep Power: 188	"mattkim85" in CA already got pulled over for his being to loud. Check the classifieds. __________________ Q50S Q60 RS400

08-21-2009, 10:31 PM	#6 (permalink)
One_Quick_Z A True Z Fanatic Join Date: May 2009 Location: Seneca Il Posts: 1,374 Drives: 10 Civic EX Sedan Rep Power: 219	I like the loudness under WOT that is why Im going to get Test Pipes when I get Exhaust I loved the sound of my Borla With APS test pipes, Megan Racing Headers on my 06 350Z DAN __________________ -My BRZ with exhaust will decimate all if we overnight parts from Japan- 10 Civic EX Sedan- Current Daily

08-22-2009, 08:30 PM	#9 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	OK OK OK.. I did it today! I took off the Berk HFC's! Oh my God! I love my car again!!!!! It sounds about 75% less noisy. 100% less raspy! 100% less drone! and still has a sporty sound at the upper rpm range. To be honest, I drove home with a smile on my face the entire drive home from the exhaust shop, and that's the first time that's happened. If anyone is one the fence on this one. I hope this pushes you in one way. Good luck to all! __________________ 2009 370Z, Had Berk HFC and un-installed them cuz too noisy!, Stillen CBE, 10mm rear wheel spacer, K&N drop in filters. Blower to come...

08-30-2009, 05:32 PM	#13 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	Laws are made to be broken. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

08-21-2009, 03:32 PM	#4 (permalink)
JB1 Track Member Join Date: Mar 2009 Location: Chicagoland Posts: 748 Drives: 09 Nissan 370Z sold Rep Power: 18	What about stock exhaust en HFC's? That is the setup I am going for. From the video's DDM posted, it sounds good, not too loud and it should yield nice performance gains.

08-21-2009, 05:55 PM	#5 (permalink)
blackbird Base Member Join Date: May 2009 Location: Nashua NH Posts: 179 Drives: 09 370Z BLk GTM TT Rep Power: 16	I have the Stillen CBE, HFC, Headers, Gen 3 intake. car sounds like a Z. Cruising at 3000-3500 RPMS, sound is not harsh. Easy having conversations etc. In the hurry-up mode, it has a distinct throaty sound. Course this is comparing to just the Stillen exhaust since I had them install on day 3 of owning the car. Happy driver and local Law types have not stopped me. But this is Live Free or Die country. Or it could be I'm losing my hearing, but who cares.

08-21-2009, 10:37 PM	#7 (permalink)
tstrick9 Base Member Join Date: Jun 2009 Location: north carolina Posts: 45 Drives: 2003 cobra, 2006 tb Rep Power: 16	I thought it was against federal law to removing functioning cats even if they were replaced with other cats.

08-29-2009, 10:50 PM	#10 (permalink)
2fast4thelaw Enthusiast Member Join Date: Feb 2009 Location: Denver Co Age: 50 Posts: 403 Drives: 09 370Z Sport/MT6 Rep Power: 17	I havent pulled my cats yet and I may not. I just got my car back from the car audio shop and they put 120 sq ft of sound deadning in the car and it is sooo quiet inside. I can't hear the anoying drone anymore. Its a night and day difference not to mention hardly any road noise now. I can live with HFC now. Without the sound deadning, I was ready to yank them like "John370z"

08-30-2009, 12:07 AM	#11 (permalink)
MacDaddy Base Member Join Date: May 2009 Location: NRH2O, Texas Posts: 32 Drives: 09 370Z MB 7AT Rep Power: 16	2Fast, not to get off thread but other than the doors, where did the shop install the material...I'm guessing dynamat??? Fixin to do mine thanks mac

08-30-2009, 01:54 AM	#12 (permalink)
2fast4thelaw Enthusiast Member Join Date: Feb 2009 Location: Denver Co Age: 50 Posts: 403 Drives: 09 370Z Sport/MT6 Rep Power: 17	Actually I used Rammat. Its not only cheaper but its better. I bought 2 rolls which are 62.5 sqft for about a $100.00 a roll. Plus I bought 6 yards of ensolite foam barrier that is glued to the Rammat. RAAMaudio I had it applied double layer in the trunk floor and wheel wells and yes, both doors. It was very well worth it as the car is amazingly quiet inside. I had the entire interior of the car removed. I am adding pictures of the process on the Audio thread but there are a few there already.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Berks vs AAM High flow cats?	zulus370Z	Intake/Exhaust	28	12-09-2015 12:45 AM
AAM Competition High Flow Cats	Rob@Altered	Group Buys	3	12-03-2009 02:04 PM
High Flow Cats and Y-Pipe	DNadar	Intake/Exhaust	0	06-11-2009 04:44 PM