So the Z doesn't come with true dual exhaust....
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Joined: Oct 2005
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From: TX
Originally Posted by sean1967
ok, you show the two cats, what i was saying in my very first post is that you would need to buy to high flow cats as opposed to just one, price consideration is all i was getting at.
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Joined: Mar 2003
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From: Charlotte, NC
Originally Posted by EdgeOfSanity
the s2k and neon cant be TD becuase they are Inline 4 engines.
As I was reading through the posts I didin't think anyone had noticed the original question.
Which is why it's rediculous to see a Civic with a body kit and dual exhaust...
The poster confused about the cats is a retard. Do you even own a Z, dude? Exhausts are called cat-BACK for a reason; the cats stay on the car and you replace everything in BACK of them for aftermarket exhaust. The VQ engine is a V6, therefore, two banks of three cylinders, which exhaust on each side of the engine into a manifold, then cats (primary and secondary) for a total of four cats; two on each side. In the stock exhaust, these feed into the Y-pipe, then combine into the single mid-pipe. For a dual exhaust, each side runs straight back from each cat to separate mufflers and may or may not incorporate a crossover. You DO NOT replace or add cats when adding an exhaust or when going from the stock style to a true dual. I don't know any simpler terms to put it in, man.
The poster confused about the cats is a retard. Do you even own a Z, dude? Exhausts are called cat-BACK for a reason; the cats stay on the car and you replace everything in BACK of them for aftermarket exhaust. The VQ engine is a V6, therefore, two banks of three cylinders, which exhaust on each side of the engine into a manifold, then cats (primary and secondary) for a total of four cats; two on each side. In the stock exhaust, these feed into the Y-pipe, then combine into the single mid-pipe. For a dual exhaust, each side runs straight back from each cat to separate mufflers and may or may not incorporate a crossover. You DO NOT replace or add cats when adding an exhaust or when going from the stock style to a true dual. I don't know any simpler terms to put it in, man.
Originally Posted by uncutZ00
would putting in true dual exhaust make a big difference in terms of performance?
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Joined: Jan 2006
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From: nj
Originally Posted by MustGoFastR
You DO NOT replace or add cats when adding an exhaust or when going from the stock style to a true dual. I don't know any simpler terms to put it in, man.
ZU L8OR
booger
Z Eliminator
ep3
IP Gthreefive
sdkingka
SteveG
Bubble
steve
blktrack
koolzero
NOBI
DJK
wren57
ZinMiami
davidv
gdwisni
scarface9
excid182
that was just a sample, Nismo carrys high flow cats from the dealer, just in case you need some help upgrading now
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From: nj
Originally Posted by ActionJackson
You don't have to replace your cats... they did it for performance gains only -_-
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From: King of Prussia, PA
Originally Posted by Armitage
To answer your first question, neither the S2k nor the SRT-4 I believe are true duals. The Mustang GT is (has been) as well as the Corvette.
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Joined: Mar 2004
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From: West Springfield, MA
Originally Posted by Gsedan35
Real world numbers from the 350Z sports magazine dyno shoot out awhile back. Look at torque and where the power is delivered and over what range.
Note that the top 3 are TD setup's, though if we want to split hair's the Stillen does use a X crossover and the Borla a H crossover. Also, the Injen tested is not the current straight tip, don't really see where that would effect numbers anyhow.
Borla (car 2) = 8.2 Hp - 2.7 ft/lbs torque (peak values)
HP increase from 5500 rpm to 6500 rpm range. Lost HP & torque below
1800 rpm. 60mm pipe. Weighs 52lbs.
Stillen (car 1) = 8.1 Hp - 7.3 ft/lbs torque (peak values)
Hp and torque increase starting around 3000 rpm to redline. Lost a
little Hp & torque below 1800 rpm. 60mm pipe. 74lbs - 10 lbs heavier
than the stock system.
Injen (car 1) = 7.6 Hp - 5.1 ft/lbs torque (peak values)
Small torque loss at 2800 rpm. Torque gain starts at 3300 rpm. Small
Hp increase starts at 3300 rpm, maxing out from 5800 rpm to redline.
Major loss in Hp and torque below 2200 rpm. 49lbs.
Nismo (car 1) = 6.3 Hp - 4.5 ft/lbs torque (peak values)
Developed torque and Hp over wide rpm range. Torque increase starting
at 3000 rpm. Most HP increase from 4800 rpm to redline. No power
losses below 1800 rpm. 54lbs.
5Zigen (car 2) = (-3.4) Hp - .02 ft/lbs torque (peak values) Lost Hp,
no real torque gain. Most expensive. Loudest. 58mm pipe. Lightest
@ 25lbs.
Note that the top 3 are TD setup's, though if we want to split hair's the Stillen does use a X crossover and the Borla a H crossover. Also, the Injen tested is not the current straight tip, don't really see where that would effect numbers anyhow.
Borla (car 2) = 8.2 Hp - 2.7 ft/lbs torque (peak values)
HP increase from 5500 rpm to 6500 rpm range. Lost HP & torque below
1800 rpm. 60mm pipe. Weighs 52lbs.
Stillen (car 1) = 8.1 Hp - 7.3 ft/lbs torque (peak values)
Hp and torque increase starting around 3000 rpm to redline. Lost a
little Hp & torque below 1800 rpm. 60mm pipe. 74lbs - 10 lbs heavier
than the stock system.
Injen (car 1) = 7.6 Hp - 5.1 ft/lbs torque (peak values)
Small torque loss at 2800 rpm. Torque gain starts at 3300 rpm. Small
Hp increase starts at 3300 rpm, maxing out from 5800 rpm to redline.
Major loss in Hp and torque below 2200 rpm. 49lbs.
Nismo (car 1) = 6.3 Hp - 4.5 ft/lbs torque (peak values)
Developed torque and Hp over wide rpm range. Torque increase starting
at 3000 rpm. Most HP increase from 4800 rpm to redline. No power
losses below 1800 rpm. 54lbs.
5Zigen (car 2) = (-3.4) Hp - .02 ft/lbs torque (peak values) Lost Hp,
no real torque gain. Most expensive. Loudest. 58mm pipe. Lightest
@ 25lbs.
Okay....let's look at the Stillen and the Nismo as examples here. There is a 1.9hp difference between the two, and that was with the exhausts on two different cars. Have you any idea of the normal variation in dyno results between even the SAME CAR on two dyno runs, let alone two completely different vehicles?
New Member
Joined: Feb 2019
Posts: 157
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From: Michigan
If you live in an area like California where they do have inspection tests, you could just swap out parts to make your car pass, then put everything back on it again, granted this would be a hassle to deal with.
P.S. anyone can still get pulled over for noise pollution if your car is too loud and the cops pull you over (take off cats for test pipes = hella loud, could be problematic)
I don't know if this has already been answered but: Not every state has the same laws. Liberal states such as California will have very strict laws about emissions, where you need inspections every month. Other states such as Michigan, home to the automotive industry, don't have such laws. Here in Michigan, there's no emission tests at all...and hopefully it'll stay that way.
If you live in an area like California where they do have inspection tests, you could just swap out parts to make your car pass, then put everything back on it again, granted this would be a hassle to deal with.
P.S. anyone can still get pulled over for noise pollution if your car is too loud and the cops pull you over (take off cats for test pipes = hella loud, could be problematic)
If you live in an area like California where they do have inspection tests, you could just swap out parts to make your car pass, then put everything back on it again, granted this would be a hassle to deal with.
P.S. anyone can still get pulled over for noise pollution if your car is too loud and the cops pull you over (take off cats for test pipes = hella loud, could be problematic)
New Member
Joined: Feb 2019
Posts: 157
Likes: 15
From: Michigan
. Yea IMO I think just test pipes will be loud, but I've only heard this from youtube videos (probably doesn't do justice). Each person has their own opinion on what's "loud", for example my friend thinks my STOCK 350z is "extremely loud"...
HAHAHAHAHA thats fking hilarious, I'm such a dumbass . Yea IMO I think just test pipes will be loud, but I've only heard this from youtube videos (probably doesn't do justice). Each person has their own opinion on what's "loud", for example my friend thinks my STOCK 350z is "extremely loud"...
. Yea IMO I think just test pipes will be loud, but I've only heard this from youtube videos (probably doesn't do justice). Each person has their own opinion on what's "loud", for example my friend thinks my STOCK 350z is "extremely loud"...and then here is pretty much the same thing, just twice the displacement (i like how it shakes the camera at the end)
and after i swapped axle back
Last edited by travlee; Mar 13, 2019 at 06:14 AM.
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