Dang, they finally got released! I wonder how long the introductory pricing will last. It's definitely a good price.
It's too bad they don't fit 370Z test pipes. How much power do you guys think would be sacrificed using stock 350Z cats?

Quite a bit. It'd be just like bolting up your stock cats again. The cats are the biggest bottle neck of our system.

What should the install of these headers cost?

Headers are I think an 8 hour job out of the book. Usually like 6-8, so that plus whatever your shop's hourly rate is.

Yup, you're roughly lookin 700-1k+ depending on the whether they do flat rate or if they do actual hours worked on it.

Go get them guys.

Z1 Motorsports VQ Performance Headers

Just so I understand it right, to get these, you must also get a 350Z Test Pipe correct?

And it will mate with 370Z exhaust systems? Or are there specially made TP/HFC combos?

You have to get the 350 TP's or Cats per there site.

Well. Lets see what the initial reports have to say. 3k to try and retune, ill pass unless these things with the z1 hfc make significant increase all over

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So let me get this straight. As per Z1, you need either stock 350 cats or the Z1 hi-flow cats for them to fit in our 370s. Pricewise why wouldnt you simply just get long tubes instead (other that being emissions friendly)? Longtubes would probably give you more gains anyway

Totally agree...this kinda sucks and I was looking forward to putting some headers but having to get hfc as well? Ain't not body got time for a 9 hr install.

... getting HFC won't slow down the install AT ALL. It adds ZERO time to the install.

The gains are about even. With LTH you have to extend the O2 sensors are are a little harder to install. But what isn't on the car.

As of right now you need 350z TP's, Cats, or HDC's. but IMO id only want headers if I could run TP's. the purpose is to get the most free flowing exhaust setup on that end of the car. This really is small beans. And to everyone complaining about the install time. That's old news. Been that way since the 350. Time to learn how to work on your car.

So you're saying running these Z1 with test pipes will yeild about the same gains as full long tube headers? And what do you think noise wise? Thanks

I know for a fact. I proved it here along with another forum member named Mike and a couple others. Your exhaust setup will be a factor on how much it helps. Between four of us with all NA breather mods and tune we were pulling between 330 and 349whp. One guy did 326whp on these headers and stock exhaust. My exhaust was to free flowing to get the higher numbers. I had the Greddy.

The sound is perfect. Apt of that again depends on your exhaust. But ultimately it's up to you.

I made 324whp with these headers and TPs, with an exhaust leak that I found after I got the car back from the shop. I'm assuming I probably would have made around 330ish if the initial install wouldn't have been screwed up.

I agree with Spohn... What's the point of installing headers with HFCs? Nice free flowing headers only to be choked up at the cat... Don't even mess with aftermarket headers if you go that route. And for the people that are confused, you don't have to run just Z1 brand TPs or HFCs to mate up with these headers... They can be any brand as long as they are for the 350z DE!

that was a quick 5 weeks! I can install myself, so with a tune it will be decent, of I get 20 whp from the headers and tune I say it was worth it!

The only thing I'm worried about is noise. I'm running the HKS hi power which I would say is pretty free flowing already together with Berks HFC. I'm hoping to gain a little more noise at lower rpms compared to now and more power of course. Deciding between either F.I long tubes or these Z1 headers with test pipes. Just worried that the test pipes would be too loud cause people are saying they're a LOT louder.

if you go LTH, your screwed either way with noise. Shorty with test pipes = a 2 piece LTH. Both will scream and both will be loud. At least with Z1, you can get resonated TP's to bring the noise and rasp down ever so slightly.

The biggest thing holding me back (other than being short on money until the end of summer), is the volume. I have the Litespeed exhaust, which is already pretty loud. I'm afraid that my whole neighborhood and everyone in my parking garage will want to kill me if I pair that up with these.
Chrischhorn, do people like your setup? Is there a lot of rasp?

Rasp is actually fairly minimal but you are right. This bad boy screams at WOT. Cold start idle is pretty loud too but calms down after warmed up. I park in a parking garage and k would probably be safe to assume my neighbors hate me but I also leave every morning at 6 a.m. lol. I'll get you some sound clips tonight or tomorrow morning. Btw, drone is probably medium but bareable. the Resonators on the lite speed exhaust definitely do their job for rasp and most of their drone but its a muffler delete so you can't expect all drone to be gone. I love how the system sounds and I get compliments all the time. Also told surprisingly its not as loud as they expected driving regularly.

Hey Chris. Is this mod worth it? Is the power bump noticeable? do you know how much power you gained with the TP and headers?

Looking forward to the clips!

So I have these Z1 headers together with ART pipes (which should reduce the drone and rasp) coming and should be installed by next Friday. Currently I'm running stock headers with berks HFC and HKS hi power catback. I'll let u guys know how it sounds and if I feel a power diff when everything is said and done ;)

Whats going to be interesting is the setup of ART pipes with HKS hi power as that will give FOUR helmholts resonators. Two at the the test pipes, two at the axle which is actually the same as running a full motordyne exhaust.

Sound clips would be amazing!

Starting up in the garage must sound pretty beastly then! They're multilevel tunnels essentially.
Sounds like you haven't gotten any formal complaints yet, so that's always a plus :)
I'll be getting ART pipes, and from your descriptions the headers+test pipes+Litespeed combo sounds great.

Sorry DarkJak, didn't get a chance to take the car out for vids last night as the wife was.....well being the wife lol. I'll try to get it ASAP. Take a vid on my way to work tomorrow.

Haha it's alright, everything else in life should come first! I'm just super grateful that you're getting sound clips.

Sorry for the long wait but here are some quick shootings. Let me know if You'd like any other sounds clips. Not many places to open up the Z on Oahu lol.

Sorry this one is a WARM start up and a "normal" take off lol.



This one is a 2nd gear pull from 2k to 7k with highway cruising at 65mph with a small downshift and coast at the end.

Fixed for ya.:tup: And thanks for sharing the videos.:tiphat:

Edit: Dang! Dat LiteSpeed sounds amazing!

Chris, how did you get the tips to extend so far out? Mine sit tucked under the diffuser even after maxing it out on adjustment..

haha THANKS! I was like :wtf: Fail on me for not reading how to post vids lol.

Hmm really? This is the driver side that lined up pretty well. Didn't have to adjust much to make it fit the way it is now. My passenger side NOW matches perfectly after getting rewelded to match the heights but it sits identical to driver side now.

My Hks sits tucked under the diffuser too. And I've noticed that's because our Nismo diffuser extend 1-2 inches out than the non-nismo ones.:shakes head:

Haha no problem man.

+rep and thanks for the vids!

The passenger side misalignment is the achilles heel of the Litespeed exhaust. Wish I had mine rewelded. Instead, we bent the brackets till it lined up >_<

Heres a few more of the interior driving so you can kinda tell the in cabin noise. The drone can be pretty brutal around 3k rpms.

2nd gear pull again


3rd gear pull


Normal driving


The camera is mounted on the hatch glass so it may be a bit louder back there then in the driver seat. Its not terrible IMO but I'm also use to be around loud stuff all day lol.

Repped, thanks for the vids! Oh man that sounds awesome from the cabin! Just the CBE has drone too, so drone with headers and test pipes isn't surprising at all haha.
At first I was shocked by how many times louder it was than the radio until I realized all the speakers are in the front and the hatch just acts like a resonating chamber for the exhaust.

I'm really looking forward to having this setup bt with art pipes instead :) And hoping that Z1 updates the momentum headers to 370Z flanges by the time I get back to the states. Then again, 350Z art pipes could probably be bought for a bit less.

I'm running stock cats and headers with FI 18" res exhaust.

Swapping stock cats for Z1 HFC along with the Z1 headers would make it way louder?

Indeed

~10 db I bet. Probably gonna be very livable still though.

Gotta wait and see what some folks say. I wanna see a few dyno runs on non-mustang dynos.

Lol yup. I only have base model so I don't have the extra speakers behind the seats lol. 350z ART pipes are always up for sale all over the place. It'd be worth a shot to see if investing some extra time to find some would be worth it. I'm always diggin for deals so patience is my game to get what I want/need :tup::tiphat:

Anyone confirm lower pricing if you call? I was just going to order online but I might have to sneak out of work early and call if we can get a discount.