Headers or Test pipes or both with stock exhaust?
 

Im sure this has been asked but I cant come across it in the search.

Has anyone changed the headers to short tubes with downpipes/test pipes and kept the stock exhaust?

Alternatively has anyone changed to long tube headers and kept the stock exhaust?

Im keen to improve responses a touch and give the car a bit more sound but where I live its hard to get away with changing exhausts and also I live in an area plagued by speed humps so dont want to risk lowering the pipes under the car. Having bigger exhausts or anything too loud will make me stand out to the police and cant be bothered with the chew.

Yes, the best of the best is the following Z1 headers(momentum copy)& Testpipes. especially when combined with their Moddified Intake manifold. i.e.
VQ37VHR 400HP Package

this is their headers teaser video. the guy in the video has stock cutback
https://www.youtube.com/watch?v=XnIKyNpNsF0

Mucho thanks! Will have a read through and watch the vid.

There is also a couple of threads here about the Z1 headers. they should also help in making your decision.

Thanks having a read up on the short headers with test pipes or something like fast intentions long tubes.

Need to start viewing some youtube vids and reading into it more.

Don't want to alter the stock tune on the engine yet as its still very new incase any warranty issues.

Your best bet is to NOT get headers, but test pipes and a CBE instead.

I have authentic Momentum headers, test pipes, CBE, pulley and G3 intake without a tune because I too like my warranty, so issues with the car.

it's not the money
 

I'm just not into much modding or the hassle of changing headers.

Don't want to spoil it for any manufacturer or hobbyist, it's just me.

I'm going to try doing the same with this car as my last.

Stock intakes, cats & resonators delete, + test pipes & Osirus tune.

The tune not only will adjust to/compliment the new exhaust but will raise my H.P.- improve my H.P. curve-raise it & the red line to a higher/better RPM. Also it actually helps it pass inspection & keep it in warranty form.

My tuner not only does his thing, but doesn't get upset if I ask for some custom/my own idea adjustments.

I already changed the gears & will work on traction in early spring.

I'll see what happens/times I do. My goal is to drive to the track, have a cup of coffee, put my car into drive & do 12.7's.

you won't pass inspection with test pipes unless you know someone… always helps to know someone… ;)

A) we're in commie CA
B) this guy is on the other side of the world

"we're in commie CA"

So freakin sad. The most beautiful state in the country ruined by A holes.....

You can't even get 93 octane :shakes head:

Hey, they can impose laws, you just don't have to follow them. It's easy, lol

And 93 octane is due to too many people having nice cars. Blame those a-holes, lol

Agreed about commie Cali, but the guy that said he was trying to pass inspection is in New York… Isn't new york just as bad on SMOG? I could be wrong. but yeah if I were in Dubai, Id go all out with the no SMOG rules

Well, NY is almost as bad as CA for everything, guns for sure

We get connected to Albany by a computer. The tuners here make sure there's no problems.

A month ago I put a 3:90 350z gear pumpkin into my new 370z. Even with the engine light on from censors reading the front wheels spinning not matching the rear wheels, the service guy told the mechanic, "just pass him" .
I could never survive in Cal......

"guns for sure"

Not really. It's only in the N.Y.C that there's a problem. I can carry anywhere in the state, even with my fingerprints at the FBI & with a serious mental condition.

As long as you're white, there's no problem :icon14:

Awesome! i was unsure of how they did it in New york. thats one state i have not had the privilege of being able to live in yet.

We don't have emissions tests in the Dubai (well we do but they never use them) its just noise and altering from standard are the issues.

Some crazy modified cars exist out here but you do need to know someone within the registration/licensing department or pay sill money in order to get away with it. Alternatively you can just be lucky and they wont notice, but im not from here so they will notice lol

Will do more research into the shorty headers with test pipes or the long tubes. From past experience tuning LS2's im assuming the same rules apply with this engine, the long tubes will add more to the top end but lose a touch at the the lower rpm's?

I rarely extend the car to the higher RPM's so if the long ones lose power low down I think it will make my mind up for the shorties and test pipes.

Actually its just the opposite with these motors… http://www.the370z.com/intake-exhaus...vids-dyno.html

but this is just based of one persons results… if your looking for some low end, look into getting the Motordyne intake manifold also.

Im not sure how the Z1/momentum headers compare to the long tubes, but seems it would be the same result, more high end. but I could be wrong. hope this helps

Interesting reading on that thread, suppose the shorties give the flexibility of going straight to test pipes and if the noise is too much replace with resonated/cat equipped ones, the long tubes from the vids ive watched seem to rack the volume up a notch or two.

I agree. long tubes do seem to have a sound that test pipes can't replicate however.

So he made 330 WHP and 270 WHTRQ, Motion Lab just tuned a car with less mods( Intake+TP's stock exhaust), No headers and made almost the same WHP( 321) and more WTRQ(289)???

Impressive

is there a thread to this, id love to read up on it

Good results but no doubt not on the same rollers so some variances will exists. Is their a vid to this one with tp's and stock exhaust be interesting to hear what the results sound like?

I'm not against headers for very serious racers
 

but for the 07/08 HR's & the 370 Z's, the manufacturer made/installed excellent headers! Might as well say excellent dual intakes as well, yet those seems like the first things that are replaced :confused:

Test pipes might be the best first move then? See how I get on and if want a bit more sound go headers!

Also im not considering changing the air intakes as I need the engine bay looking as stock as possible for the yearly check we have here, are upgraded panel filters inside the air boxes a worthwhile upgrade?

I run K&N drop in, I did not notice a change in anything. I later bought HPS silicone tubes and still no difference.

I mod for performance not sound-as far as sound
 

test pipes or after market headers when driven on the street make the cars sound like chit. Raspy, crappy, chit!!!! So I don't get it :confused:

If you're looking just to sound loud then take the muffler off.

I have the following setup:

Fast Intentions longtube headers
Motordyne XYZ-pipe, w/ cat

exhaust is stock other than those parts. yes, it's not the most ideal setup for all-out HP.

just cruising around, light throttle and low rpm my exhaust is just a hair louder than stock. just enough to let you know it's not stock.

once you put your foot into the pedal it comes alive, but not super loud that any cop within a mile will hear you coming.

I'll have to break out the gopro one of these nights...

get PPE equal length headers, they have better gains than FI LTH iirc


lol cali isnt that bad, get a mailbox outside of smog zones and register your car and change your address there than set up mail forwarding from your new address to your home address

preferably dont get a PO box, get a UPS or Fedex box since it says the address of the store followed by your mailbox number so it looks like an apartment at first glance and no 2 year check up

As I thought as the stock design does look good, I may drop in higher flowing panels at some point but the amount of sand where I live it might be best to stick with the stock ones!!

How can it make it sound like crap when its still connected to the stock exhaust with stock mufflers in?

I dont want to change the stock exhaust as I may have issues getting the car through its yearly test here, however a touch more noise would be nice and also freeing up a little bit of power would also be good.

If you do get a chance to make a vid it would be interesting to hear!

my mistake
 

I meant to say if you REPLACE your CATS with test tubes or headers that eliminate cats, it will sound raspy & crappy.

That's what happened to me. After changing my cats with test pipes I almost asked my installer to switch back. He told me, you'll get used to it:)
"RASPY"

I would recommend listening to them online if not possible in person.

Dont suppose you got a video of yours when you had them on did you?

What did you change to?

You'll blow your stock exhaust with test pipes. Better to get both

Could you expand on that a little?

I didn't blow anything or anyone :icon14:

Lmao critical.

He is right, you should get a new exhaust.

two of my mufflers went bad and started rattling.

you didn't blow anyone...ok whatever you say.