STILLEN 370Z Dual Cat-Back Stainless Exhaust System

dlmartin81 · 03-06-2009, 07:26 PM

Josh, Kyle,

Any updates on the decision of making optional angled tips for your exhaust?

It sounds GREAT by the way!

semtex · 03-06-2009, 01:09 PM

I just finished posting my full write-up, including video clips. Enjoy.

Stillen Exhaust with Berk HFCs

spiderman · 03-08-2009, 11:06 AM

Quote:

Originally Posted by semtex

I just finished posting my full write-up, including video clips. Enjoy.

Stillen Exhaust with Berk HFCs

Video clips rock semtex, thanks! How hard was the install for the Berk HFC's? Other posts say they're a real pain to install as the original bolts are real tight (broken sockets, need a torch, ...). Any feedback?

semtex · 03-08-2009, 11:10 AM

Quote:

Originally Posted by spiderman

Video clips rock semtex, thanks! How hard was the install for the Berk HFC's? Other posts say they're a real pain to install as the original bolts are real tight (broken sockets, need a torch, ...). Any feedback?

I believe I go over the Berk HFC install experience in my write-up. I also recommend reading the DIY that DDMotorsports provided.

http://www.the370z.com/diy-section-d...c-install.html

Arcangel · 03-08-2009, 11:18 AM

The Stillen has my favorite sound out of all the exhausts so far!

LiquidZ · 03-15-2009, 08:46 PM

Semtex, do you plan on getting a dyno test?

semtex · 03-16-2009, 07:02 AM

Quote:

Originally Posted by LiquidZ

Semtex, do you plan on getting a dyno test?

After I get the Stillen G3 intakes installed.

LiquidZ · 03-16-2009, 08:16 AM

Quote:

Originally Posted by semtex

After I get the Stillen G3 intakes installed.

Great. Can't wait to see your results.

drisko · 03-17-2009, 09:03 PM

ANYONE KNOW HOW MUCH LIGHTER THAN STOCK THIS EXHAUST IS???

I'm really interested in it, but I was curious about the weight.

takimbe · 05-01-2009, 06:43 AM

I just got these installed at Stillen today. pics to come! Josh gave me a great tour of their facilities and I ended up making an impulse buy and I have no regrets! this is the best sounding exhaust out there!

john370z · 05-08-2009, 09:45 PM

Hi all! Just had installed the Berk HFC and the Stillen cat-back exhaust. I have some comments and questions...hopefully the experts here can help me....

I think the install was done right. good cross member clearance, no obvious rattling or leaks...but

1.) There is a hiss, like a vacuum valve is opening, around 1800 rpm on the down rev
2.) The exhaust note has a inconsistent very minor clang noise under hard acceleration. I have inspected the install on a lift and cannot see any rubbing to explain the metallically clang. It is difficult to describe but it's maybe 25% of the entire exhaust note. So it is noticeable but not suicide inducing..
3.) It is very loud. If anyone is looking for a little or moderate exhaust noise increase this is probably not for you.
At full throttle it is very nice at high RPM (greater than 5k)
At partial throttle at 3K-6K RPM it sounds like you are hauling a$$ and you are not.

Question- Are you supposed to use those rubber ballencers (sp) that is bolted on to the stock exhaust? Are my experiences similar to your other experiences with similar exhaust modifications? Did you disconnect the battery to reset the ECU? How long do you expect the computer to take to make necessary adjustments?

In a perfect world I would like the exhaust note to be less raspy or metallically at times and be a little quieter at partial throttle. Love it at WOT.

Man I sound like my wife after waking up on the wrong side of the bed. Sorry for the vent. As you can tell I was expecting it to be a little more refined sounding and less audibly intrusive during regular driving at low RPM's. I hope I can get used to it and even grow to love it. Many of you have said it is A LOT LOUDER. You are right. Any comments or answers are greatly appreciated. Thanks for listening..
John

wstar · 05-09-2009, 10:34 AM

Quote:

Originally Posted by john370z

Hi all! Just had installed the Berk HFC and the Stillen cat-back exhaust. I have some comments and questions...hopefully the experts here can help me....

I think the install was done right. good cross member clearance, no obvious rattling or leaks...but

Well that's good to hear at least

Quote:

1.) There is a hiss, like a vacuum valve is opening, around 1800 rpm on the down rev

Others have commented on the hiss, myself included. It could just be inherent in the nature of this exhaust, it could be from the Stillen intakes, or it could be an exhaust leak. It's kinda hard to tell. My car is cooling off on ramps right now to fix my exhaust leaks though, so I should be able to eliminate at least one option soon.

Quote:

2.) The exhaust note has a inconsistent very minor clang noise under hard acceleration. I have inspected the install on a lift and cannot see any rubbing to explain the metallically clang. It is difficult to describe but it's maybe 25% of the entire exhaust note. So it is noticeable but not suicide inducing..

3.) It is very loud. If anyone is looking for a little or moderate exhaust noise increase this is probably not for you.
At full throttle it is very nice at high RPM (greater than 5k)
At partial throttle at 3K-6K RPM it sounds like you are hauling a$$ and you are not.

Personally I love the nature of the sound. That sound just exudes no-nonsense raw power. When I downshift my engine sounds like a sportbike revving now (well, not quite, but it has that sort of character compared to other cars I've had in the past). If you have a leak, that could be exacerbating any rasp though. Again, shortly I'll get to see how mine is when it's leak-free.

Quote:

Question- Are you supposed to use those rubber ballencers (sp) that is bolted on to the stock exhaust?

Yes, it's in the instructions, and the Stillen unit has mounting spots for them.

Quote:

Are my experiences similar to your other experiences with similar exhaust modifications?

The main difference between you and some of the rest of us reporting on this install is that you didn't have any fitment issues clearing the crossmember, which is a good sign that either their change worked and/or the rest of us just screwed up our installs slightly

Quote:

Did you disconnect the battery to reset the ECU? How long do you expect the computer to take to make necessary adjustments?

I don't think disconnecting the battery really helps much. The car is going to learn your changes regardless, although maybe slightly slower. I don't know how long it really takes, but within a couple hundred miles I think you're pretty gtg.

Quote:

I hope I can get used to it and even grow to love it. Many of you have said it is A LOT LOUDER. You are right. Any comments or answers are greatly appreciated. Thanks for listening..

You probably will grow to love it, I have anyways. Now my neighbors on the other hand... I think they're plotting to blow up my car

Josh@STILLEN · 05-08-2009, 10:22 PM

HFCs will introduce some rasp into the exhaust note. For some it's the sound they are looking for, for others used to a refined exhaust note, it seems shockingly apparent. HFCs will also increase the overall volume of the exhaust note. HFCs and test pipes can also have an audible (test pipes significantly more) 'hiss' under deceleration. But if you think it's beyond that, I would absolutely look for an exhaust leak. A week of driving should provide enough carbon that will appear on the exhaust for a manual inspection to root that out.

john370z · 05-09-2009, 09:31 AM

thanks josh. I'll wait a week...see if I get used to it and to see if there are any exhaust leaks. I can always put back on the cats, I'd like not to though.
john

john370z · 05-09-2009, 12:08 PM

Thank you so much for the feedback!

03-06-2009, 01:09 PM	#2 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 33	I just finished posting my full write-up, including video clips. Enjoy. Stillen Exhaust with Berk HFCs __________________ "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.

03-08-2009, 11:18 AM	#5 (permalink)
Arcangel Base Member Join Date: Mar 2009 Location: Manalapan NJ Posts: 98 Drives: Blk 07 Cobalt SS/SC Rep Power: 189	The Stillen has my favorite sound out of all the exhausts so far! __________________ God has given us two hands -- one to receive with, and the other to give with. We are not cisterns made for hoarding; we are channels made for sharing.

05-08-2009, 09:45 PM	#11 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	Hi all! Just had installed the Berk HFC and the Stillen cat-back exhaust. I have some comments and questions...hopefully the experts here can help me.... I think the install was done right. good cross member clearance, no obvious rattling or leaks...but 1.) There is a hiss, like a vacuum valve is opening, around 1800 rpm on the down rev 2.) The exhaust note has a inconsistent very minor clang noise under hard acceleration. I have inspected the install on a lift and cannot see any rubbing to explain the metallically clang. It is difficult to describe but it's maybe 25% of the entire exhaust note. So it is noticeable but not suicide inducing.. 3.) It is very loud. If anyone is looking for a little or moderate exhaust noise increase this is probably not for you. At full throttle it is very nice at high RPM (greater than 5k) At partial throttle at 3K-6K RPM it sounds like you are hauling a$$ and you are not. Question- Are you supposed to use those rubber ballencers (sp) that is bolted on to the stock exhaust? Are my experiences similar to your other experiences with similar exhaust modifications? Did you disconnect the battery to reset the ECU? How long do you expect the computer to take to make necessary adjustments? In a perfect world I would like the exhaust note to be less raspy or metallically at times and be a little quieter at partial throttle. Love it at WOT. Man I sound like my wife after waking up on the wrong side of the bed. Sorry for the vent. As you can tell I was expecting it to be a little more refined sounding and less audibly intrusive during regular driving at low RPM's. I hope I can get used to it and even grow to love it. Many of you have said it is A LOT LOUDER. You are right. Any comments or answers are greatly appreciated. Thanks for listening.. John Last edited by john370z; 05-08-2009 at 09:47 PM. Reason: forgot stuff

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03-06-2009, 07:26 PM	#1 (permalink)
dlmartin81 Track Member Join Date: Dec 2008 Location: Chalfont, PA Age: 44 Posts: 923 Drives: 09 370Z Rep Power: 608	Josh, Kyle, Any updates on the decision of making optional angled tips for your exhaust? It sounds GREAT by the way!

03-15-2009, 08:46 PM	#6 (permalink)
LiquidZ A True Z Fanatic Join Date: Nov 2008 Location: Columbus, OH Posts: 1,940 Drives: Mag. Black 2009 370Z Rep Power: 705	Semtex, do you plan on getting a dyno test?

03-17-2009, 09:03 PM	#9 (permalink)
drisko Base Member Join Date: Jan 2009 Location: So Cal Age: 44 Posts: 160 Drives: 09 370Z PW Tour S 6M Rep Power: 17	ANYONE KNOW HOW MUCH LIGHTER THAN STOCK THIS EXHAUST IS??? I'm really interested in it, but I was curious about the weight.

05-01-2009, 06:43 AM	#10 (permalink)
takimbe Base Member Join Date: Feb 2009 Location: San Diego, CA Posts: 223 Drives: 09' PG 370Z w/SP Rep Power: 265	I just got these installed at Stillen today. pics to come! Josh gave me a great tour of their facilities and I ended up making an impulse buy and I have no regrets! this is the best sounding exhaust out there!

05-08-2009, 10:22 PM	#13 (permalink)
Josh@STILLEN The370Z.com Sponsor Join Date: Dec 2008 Location: Costa Mesa, CA Posts: 1,197 Drives: 2004 G35 Coupe 6MT Rep Power: 534	HFCs will introduce some rasp into the exhaust note. For some it's the sound they are looking for, for others used to a refined exhaust note, it seems shockingly apparent. HFCs will also increase the overall volume of the exhaust note. HFCs and test pipes can also have an audible (test pipes significantly more) 'hiss' under deceleration. But if you think it's beyond that, I would absolutely look for an exhaust leak. A week of driving should provide enough carbon that will appear on the exhaust for a manual inspection to root that out.

05-09-2009, 09:31 AM	#14 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	thanks josh. I'll wait a week...see if I get used to it and to see if there are any exhaust leaks. I can always put back on the cats, I'd like not to though. john

05-09-2009, 12:08 PM	#15 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	Thank you so much for the feedback!