To buy headers or not?

AstatenateZ

Yeah the time & money into quality headers for minimal gains over my existing mods isn’t worth it for me.

It already has full cat back and test pipes and is plenty loud / noticeable gains for me. If I was going to pickup the gains I did when I installed test pipes in addition to existing mods. Then cool.

But if it’s gonna be just a few HP I think I’ll just skip that. I already have all suspension components I want (Tanabe Coils with stiffer swift springs, upgraded sway bars, bushings, end links and camber / toe arms and bolts) she handles like she’s on rails. And I don’t rag on my car enough to upgrade cooling and my stock sport package gearing is just fine for me.

Honestly that was the last bolt on I was considering. My last 370z I had the NST pulley kit on and I liked how much faster it revved. But I honestly don’t think I’ll be installing headers or pulley kit on this one. And those were the last 2 performance based mods I was considering. Maybe a super charger if I can find a good used one for a good deal.

Also halfway considering going air ride. But very indecisive on it.

Calg37USMC

I made great power with Mortordyne LTH, but it’s a bitch to install idk if it’s any different on a 370 but at least my g37.

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12'G37s|6MT|Malbec Black|Gen 3's|MD LTH|MD E370 CBE|Uprev|342hp/274tq

Ronin06

Doing the motor mounts on mine and may need to remove the exhaust manifold. Debating on doing headers since the work is already done for the most part. However, HP/Cost is not good. To make any real power, supercharger or turbo is the way to go.

chuckie311

i gained 16whp and 3wtq with my z1 headers.. i already had full exhaust and HFC before i installed them..
Baseline no tune
291whp and 233wtq
after header install only no tune
307whp and 236wtq
tuned i made 310whp and 240wtq

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Tuned by (Seb@Specialty-Z)
2011 G37 Cam'd FBO 347whp 280wtq Corn Fed 4.08 Gears

Will 370Z

I’m new to this platform and I am interested in the horsepower per dollar topic. Of course the answer to “is it worth it” and “what should I do” is dependent on the owner’s goals with the car among several other things, but I’m curious about what modifications make the most improvement in power.

From what I’ve read, a good 3” long tube intake system and a tune are a must along with maybe a solid, free-flowing catback and mid pipes, but what would be the best next step? Headers can range from $800-$2,000 plus labor, but some have said horsepower gain is minimal so would it be best to invest in maybe E85 and/or ported intake manifolds etc?

I’m all about horsepower and having a good sounding car, but I also want to give some attention to suspension and handling. Don’t see FI in my future with this car, but I do want to add bolt ons and other things that would make this car even more enjoyable to drive

nasm

Great thread, and kindly allow me to ask this question:
A friend of mine, who is a tuner, said that 370z 2014+ no need for short headers, if I put test pipes, because they improved the stock one, and if you want a header go for long tube. That what he said.

Personally, I want the short ones, because it is easy to pass the registration test every year we do. However, I have read a lot about Z1 short headers, and how effective they are. So, now my question is, is it really worth it to go for short headers with test pipes I have with catback or no, it is not worth it? In other way, am I getting with z1 short headers 10+ whp or no?

Many thanks for sharing your experiences. Highly appreciated.
NAS

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Sold: A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines. Now: I am building another car

2011 Nismo#91

Z1 products are good but also have a lot more hype than reality. I don't understand why inspection would be a problem for LTH vs STH and test pipes except if you are swapping back catalytic converters. Generally Fast Intentions LTH are the best option performance wise. But from a Dollars for HP perspective I'd avoid LTH or STH as the gains are modest but expensive. But if your looking to squeeze every little bit of HP/TQ then you gotta spend the $$$.

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GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

projectpanda

Here is a thread of some who had z1 headers and saw gains of 16whp over stock headers, and with retune added additional 3whp or a total gain of 19whp.

https://www.myg37.com/forums/engine-...ml#post3958002

Here is another result comparison of stock vs z1. Moncef from Admin Tuning saw 18whp gain with tuning, so very similar results. He said he runs Tomei headers on his personal cars and also saw gains of 19whp with retuning.

https://www.youtube.com/watch?v=zPv3pRV1kTI

Here is another one of Moncef's video where a customer of his switched to ISR longtube and ISR y pipe from stock headers and tomei y pipe and saw gains of 20whp.

https://www.youtube.com/watch?v=xGz9DjWSMgY

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RHM 75mm TB & ported up/low mani., 3" intakes, Z1 Headers, Motordyne ART pipes, Henko Autolab 3" y pipe & exhaust, Tein MonoSport, SPL F/R arms, endlinks, and tie rods , Eibach sways, Z1 rotors F/R, diff bush., subframe collar, FDF diff brace

nasm

Thank you ...

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Sold: A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines. Now: I am building another car

nasm

Many thanks for the videos ..
It is true, and because I will need to go for short ones due to the regulations we have here, to keep switching between test pipes and catalyst whenever I do regulation renewal test.

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Sold: A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines. Now: I am building another car

husam2012

In my opinion, the only worthwhile options are the Z1 shorties and the PPE headers. The FI long tube headers (LTHs) are not equal length and don't flow well. I initially had the Z1 shorties on my car, switched to FI LTH, and noticed a power loss. After switching to the PPEs, I regained the lost power.

Recently, I dyno-tuned a 2016 370Z Nismo at my shop. It achieved 35x whp with just ART pipes, a full Motordyne exhaust, and E85 tuning. The car had stock intakes with K&N filters. In my opinion, there's no reason to pursue more NA power beyond this point.

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Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning

nasm

I agree, I will just now have the test pipes with catback. Later, I will add the headers.

I prefer to keep the car NA because I am not a fan of Force induction at all.

Thanks for sharing your experience.
NAS

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Sold: A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines. Now: I am building another car

abm89

Not to mention, labor for headers on this car is a PITA. whether you pay someone to do it or you do it yourself. I have the Motordyne Headers and my tech hates me for them lmao.

"I'm charging the next person way more for this"

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Complete Parts List:
https://github.com/abm89/ztouge-build

OptionZero

Cost/effort of installing the headers is incredibly poor value. Achieving meaningful gains past intake/exhaust requires not just headers but alot more work - E85, cams, supporting parts, and tuning.

Stop at the easy bolt ons and then decide whether you wanto REALLY commit to NA or turbo

and if your goal is learning how to drive on the track, the money is better spent on seat time (hell, better spent on a helmet)

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OptionZero Build Thread

nasm

I agree with you .. I heard the same.
Many thanks bro .. appreciated.

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__________________
Sold: A7 370z 2014 - Stillen Catback - Testpipes - UpRev - Dropin filters - Silicon intake pipes - BC racing coil overs - Z1 Subframe collars - Z1 Engine and Trans Mounts - Oil cooler - CatchCan - Z1 brake lines. Now: I am building another car