Z1 370Z / G37 400HP Package

Check out our latest video featuring Z1 performance packages for the 370Z, G37, and 350Z (HR). These thoroughly tested & proven combinations substantially increase output on the VQ37VHR & VQ35HR for a reasonable price. Our VQ37 400HP package consistently produces 400 crank horsepower with a Z1 cold air intake system, quality cat-back exhaust, and proper UpRev tuning.
400HP Package - www.z1motorspo...
Included Parts:
Z1 Performance Exhaust Headers - www.z1motorspo...
Z1 Test Pipes - www.z1motorspo...
OEM Exhaust Manifold Gaskets - www.z1motorspo...
Z1 VQ37VHR Intake Plenum Power Mod - www.z1motorspo...

[@videomaniac108]

I got 321 peak rwhp @ 7200 rpm and 264 ft*lbs of torque at 5200 rpm on my 2019 370z 6MT with a Fast Intentions TDX CBE, a Stillen G3 long-tube CBE and an EcuTek dyno tune done by Seb at Specialty Z on a Dynojet chassis dyno.. The torque scaled up about 14% to 15% across the whole rev range with the engine sounding great and being more responsive to throttle inputs. We estimate that I picked up about 46 crank horsepower from stock, with a 15% powertrain loss factored in. The car , which was a blast to drive before, is now such a beast that I often don't bother to turn on the car stereo anymore, as the sound and feel of the car is so much fun.

[@johninnh4880]

Thanks for your continued support for the 3.7 platform. I really liked my 2012 G37IPL. A 50-70 HP bump would have made that car a ton more fun. My 2018 Q50 AWD Red Sport is now, after a a lot of mods, better than my old IPL. Your 2 piece rotors were one of the first things I put on my Q. An immediate noticeable difference, along with lighter forged rims. 78 lbs lighter unsprung rotational mass. Now I'm, along with a bunch of other Q50/60 AWD owners, waiting for the HKS Hipermax IV GT coilovers to come out for the AWD. PLEASE push them to offer them! You guys are fantastic. Keep up the good work.. again THANKS!

[@BigHeadClan]

Did you see AMS just released there HPFP btw John?

[@johninnh4880]

BigHeadClan

[@BigHeadClan]

@@johninnh4880 Aye a 93 tune making 500 would be awesome, well here's hoping HKS listens. ;)

[@jogotyourhoe7734]

Did you mod your ipl? Cuz the red sport has more hp stock

[@BigHeadClan]

@@jogotyourhoe7734 It also weighs 300-400lbs more and no longer had an LSD. Kind of an apples and oranges situation. Q50 is more of a GT car strapped to a rocket, the g35/37 was a sport/luxury car.

[@viciousvq1824]

I Can't Wait! Soon I'll be ordering this 400hp Package

[@kevinz1418]

worth it! buy this with no hesitation

[@SnoopyRu1980]

You guys should fabricate some flanges to get headers to fit AWD models!🙏🏾

[@RafaelSantana-wj3vc]

Alot of people have been asking for these and so have i.! They will make even more money and have more customers at that more love then they already have lol is they just did AWD ones! They support is there for people asking hope they Do listen sometime soon we are all anxiously waiting come on Guys look out for us please lol AWD😁💯🤙 Thank you Z1 the AWad community needs Parts to go Fast💯✌

[@interstatebullly3nyg551]

Can this be modified to get headers to fit. If someone was willing to spend the money ?

[@interstatebullly3nyg551]

Tomie actually makes headers that will fit the AWD vqhr motors made for the DE motored but bolt right onto the HR. Definitely looking into that

[@SnoopyRu1980]

@@interstatebullly3nyg551 I got ISR LONG TUBE HEADERS now 😎

[@interstatebullly3nyg551]

@@SnoopyRu1980 I just saw those online. How is the quality ? I really wanted headers for my fx35 awd. But it might be too much. I already have invidia catback exhaust and stillen gen 3set up. Headers might be a bit overkill for a fx35 that I use daily. Idk. Still considering it though

[@Tunercraze]

Fantastic!!!!! I was just thinking that too! This power was achieved WITHOUT upgraded Cams!? Imagine the 15-20hp gain with a decent set of Cams!!! That VQHR motor is impressive!

[@Agenthutchins]

Tunercraze stay tuned for that “other vid”

[@jasonkmills]

im waiting too @@Agenthutchins

[@aacar4095]

Looks like a great product. I like how he keeps saying “race”…we know no one would ever think of using this on the street 😂

[@ShadyPlauge]

please give awd models headers!

[@mounir9899]

they arent the same?

[@ShadyPlauge]

@@mounir9899 they are not the same

[@bferg9264]

Do you have a similar kit for the awd version?

[@camcambambam5128]

My buddy broke record for most powerful N/A VHR today. Made 382whp 310wtrq full bolt on E85

[@licensetosend8551]

Add some nitrous and have him break it again for fastest unboosted 370z

[@licensetosend8551]

Also, what did he have installed and what year 370?

[@camcambambam5128]

@@licensetosend8551 RZG 3" Custom Intakes, Injectors, Full Tomei Exhaust E85. And it was a 2014 Infiniti Q60

[@c_dubbzz6127]

Thats awesome!

[@SickeningGojo]

Those were all the mods for 382 whp and 310 wtq? I have a 2015 Q50. Not tuned on E85, but CAI, testpipes and custom exhaust and it only pushes 338 whp/ 272 wtq. I was under the impression E85 only gives about a 12 hp/tq boost.

[@shad3128]

This would be pretty fun to pickup an 09-10 ish G series and save some dough and then buy this package and throw it on. Love that you guys bundled this and put it together!!

[@wesley8599]

08 was the last year for the 'G'. 09 introduced the Q revisions, but yes it would be sweet.

[@darkqueen624]

Not sure what you’re talking about Wesley lmfao Q came in like 2014

[@04dram04]

Package probably cost more than the car

[@killerkhalsa27]

@@wesley8599 what? That is completely false. You must have confused the g35 with a G37, g37 started in 08 and got the name change in 2014.

[@g37infiniti17]

@@wesley8599 LOL What lol? I have a 2010 G37 in my driveway right now.

[@brandonfarmer3070]

We need this kit for awd models please!

[@devynslowik6185]

Dude preach! I'm all over that..

[@noelgomez4776]

I think you can do it on the AWD but without the headers..probably 380 HP...

[@Heeba_Sheikhi]

Drum roll...I got an AWD issue.. little mods.. big dreams...

[@erike7297]

Sometimes... I wish I could run test pipes In California and not have to worry about the massive ticket I might get. Then again sometimes I don't cause it stinks pretty bad and its bad for air quality as well. I would personally want some high flow cats if I lived in an area where they would pass emissions. My car came with test pipes installed and the cats in the trunk when I bought it used. I put the cats back on a few weeks later and not only did my catback exhaust sound a lot better/cleaner and less (insanely loud) but the stinky gas smell was obviously gone. There's kind of a downside of making your modern g37 stink like its an old classic pick up truck when you remove the cats. Other than the drawbacks it seems like a great affordable way to make a very decent amount of power with this kit. Nice job Z1 I would not hesitate to buy a product off you for my Infiniti.

[@PR1NCETD0T]

Should i get intakes before this? I am also still contemplating.. whether to just save money for forced induction or just stay N/A... Honestly im kind of bored of the stock N/A power of the 370z, only thing keeping me entertained is that tomei i have on it.

[@nighthawk0077]

Drive a civic for a few weeks, it will feel like an entirely different car after and pull like a freight train.

[@c_dubbzz6127]

You should get both and a tune! Way more cheap and deff worth it compared to FI.

[@DAINSLEF]

@@c_dubbzz6127 Really? The kit is $1900 without the core refund. It's kind of dumb to do this kit and not also upgrade the catback and get a CAI. Then you need a custom Dyno tune to make the power. You're looking at probably $6000 for the CAI/Manifold/Headers/Test Pipes/Catback + Installation + Tune. Even with all that, the motor will make ~340 WHP with a good tune. If you're going to spend 6 grand on ~340WHP, may as well save for a couple more months and pay 8-9 grand for ~600WHP.

[@dejansiljegovic4467]

@@DAINSLEF Amen!

[@FLAASH_5.0]

There’s a guy with a 370z that made 376 to the wheels NA with these mods and a few more i believe

[@Daniel-vu4qu]

Please, please, PLEASE do this for the 350z/G35!

[@Z1Motorsports23]

You mean...like this?? ;) www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@user-lz3xp7xd5r]

I have a 2013 g37 sedan, definitely thinking about ordering this sometime this month

[@fernandohood5542]

Wold love to see an HR with that package on. 270 cams.

[@chadwickwhite8400]

Hopefully I’ll hit that lottery soon. Hate not being able to mod my Vert yet.

[@HKS7MGTE]

Question will this also work with the FX/QX70, M37 or Q50 3.7

[@BigHeadClan]

Dammit Spencer why you do this to me, Christmas just ended. >

[@ronron7181]

Would this support a 3.7 Q50? Why. I love for us 4 door lovers

[@kyoakland]

I have a 2010 m35s and i want 350 to the wheels wth hell do I need to do

[@jonathanperez2358]

@@kyoakland if you're rwd you can achieve this with exhaust, col air intake , test pipes , high pressure fuel pump , bigger injectors and e85. Has already been achieved by @admintuning on his finances rwd q50

[@sambeaudin4546]

Awd please ...

[@Gmoney2347]

Hope you guys make awd headers soon

[@user-nj9tr5ef6s]

This can fit in a vq35hr??

[@chinaypelukincastellanos4790]

Price 2017 370z

[@ntstkg37x62]

400 crank HP at sea level. Should test the numbers for people living in the West.

[@FrAndR0iD]

No love for AWD G's 😢

[@ntstkg37x62]

Everything in this kit fits the X models except for the Headers which nobody makes. So you can make up for that with a Full Exhaust.

[@kilokilo14]

FrAn_dR0iD no fuck off

[@PR1NCETD0T]

You can legit buy better headers, these headers are meant for the DE 350z. The only reason people buy this, is because it's a package at a good deal.

[@vq_vlogz5124]

Instead of those test pipes can I put some mortordyne art pipes ?

[@Jay-tr4nn]

Does this fit on the x cause you said only rear wheel drive

[@rawcircoking]

What do I do to my g35xs for these gains? Right now I'm only running invidia q300 exhaust.

[@HatelivesNextDoor]

came for Z parts. stayed for the sandwich criticism. this dude is the realest. and mcdonalds employees want 15$ an hour....

[@UniversalPerformanceEnthusiast]

Will this work on the 2007 G35X VQ3.5HR

[@anthoneysmith3436]

Us awd guys need parts to

[@kyoakland]

Hey I have a 2010 m35s it has the hv motor I just want 350 to the wheels can you guys help me?

[@tortugaracingchannel4402]

Any input for these items for people living in California like myself? Are these parts CA legal? I know stillen is but idk about Z1. Really want these in my Z :(

[@Z1Motorsports23]

Sorry Sal, these parts are currently not CARB compliant and are not intended for emissions controlled vehicles. They're intended for offroad use only.

[@cesargutierrez7545]

who cares? I live in Cali, have my own personal smog guy I go to. Few extra bucks every two years is worth having all of this

[@angelboyvlogs9092]

2008 350z hr does this fit 🤔🥵

[@KyleKick909]

1500-1700 dollars seems pretty reasonable seeing as my CBE cost that much. the headers seem like a massive pain to install though. i might buy everything separately and skip the headers.

[@slimjim8736]

Lol i like how they say 400hp but don't include cats for us Cali people ): would love to have one set up and installed in my Z :)

[@cheeko_914]

"Off-road use only"

[@vinckokeccee1352]

Thanks for the video Z1 guys, planing to order your CAI soon and this kit later. My question is, since i want to keep the car not very loud and street legal with no Check engine light, can i order the kit with HFC ???? And what would be the crank HP drop against the test pipes?

[@Agenthutchins]

Vincent Kecer would t technically be the 400hp pack but we can put a package together for you. Just give us a call when you’re ready.

[@07wrxtr1]

I'm in the same boat. I specifically want to run fast intentions high flow cats, so there's a flange issue apparently? I'm no expert, but given the 370zforums, it's apparent they don't match up. Could I SHIP a FI high flow cat pair to Z1, and have z1 make custom flanges so it's not a nightmare come install day?

[@vinckokeccee1352]

@@Agenthutchins will do, thank you

[@natefrm860]

What’s the difference between a sending core and the lying core for the black plastic peice ?

[@Hondacbr600rrish]

I'm not a test pipe kinda guy. I have the HFC from Z1, will this still be suitable for the 400 package?

[@georgie2844]

I can barely find any info on the cylinder heads CFM & the camshaft info for the vq37. Does anyone know any info

[@Sick_Boy.]

Waiting to be debt free by March to pick this up.

[@tez_foe4382]

Just To Go Back Into Debt

[@07wrxtr1]

I want to run this, but it does not pair up with the fast intentions high flow cats (I'm in Oregon, they test every 2 years). For those that don't want to run the z1 hfc (excessive complaints online about rasp / apparent in many videos online as well) or test pipes, what other options exist? Is this just really a question of finding a shop to custom weld a flange to the FI HFC to mate up with the z1 headers? What have others done? FI only offers longtube intakes. Not sure about motorodyne craftsmanship...

[@07wrxtr1]

Can Z1 comment on what actually causes the annoying rasp sound with some hfc / test pipes? Is it the cell count? is it simply an exhaust leak?

[@duggerd9]

QX70 ❤

[@austinmiranda8558]

Y’all need to make an awd version

[@BigHeadClan]

The headers are the only thing that don't work, it's like 10 extra horse power and the most expensive part to install. Just skip them and save the money for 2 piece rotors or intake/exhaust.

[@SnoopyRu1980]

Something about AWD models that headers just won't fit, someone needs to make a adapter to get them to fit but then again they're the most expensive part with the smallest amount of power given

[@traquilito20]

The headers do fit the engine but on the X there is a motor mount in the way. People have shaved the motor mount down and have been able to install the package as a whole on a g37X

[@jasonredepenning]

I'm holding out for a stillen supercharger although this is a nice set up.

[@user-wr5od7my4l]

Do you think the super charge would be easier on the engine ?

[@FRWD_FXLRST]

I assume catless downpipes create rasp. Which exhaust sounds best?

[@3rdeyewoke609]

Is the plenum both the upper and lower intake manifolds?

[@gdsnake98]

I cannot wait to order this, definitely next on the list!!!

[@jesseramon5013]

No ones going off-roading

[@aiibertt]

they mean its not for public road use 🤦

[@jesseramon5013]

Aibert521 you don’t get my comment buddy if u did you wouldn’t sound so dumb 😂

[@aiibertt]

That Wonder bro its hard to tell if a nigga is sarcastic or not on the internet chill 🤦‍♂️🤦‍♂️

[@jesseramon5013]

Aibert521 I you should chill with your racist slur

[@cheeko_914]

That's not what this kit is for. It's for track use.

[@leedye6687]

This removes the cat?

[@RuckIOfficialMusic]

Yeah the pipes all the way on the left are the test pipes. / non resonated = loud Good gains from putting them on but I assume you don’t have to if you don’t want. I’m rocking test pipes on mine and I love them !

[@PR1NCETD0T]

Will the headers work with art pipes/hfcs? I really don't wanna have obnoxious drone with the test pipes and it'll be my daily summer car.

[@Agenthutchins]

Yes it will work with ART pipes but they have to be “DE” flanged (like from a 03-06) 350Z.

[@98bbaby__64]

My question is can you use motordyne art pipes instead of testpipes for this kit?

[@Erikhasyou]

I was wondering this, as well. My Motordyne ART pipes will be here next month. I think I'd rather use those.

[@98bbaby__64]

Erikhasyou so i asked my tuner and he said that you can run art pipes but they gotta be DE

[@Erikhasyou]

@@98bbaby__64 Forgive my ignorance, but what are DE ART pipes? I'm very new to this.

[@98bbaby__64]

Erikhasyou haha dont its all good.. so whenever you see DE is for the 350z and G35 engines and whenever you see HR it’s for the next gen like 370z and g37, in this case you gotta use 350z/g35 art pipes for the z1 headers

[@Erikhasyou]

@@98bbaby__64 Ah, ok! I see! I'd much rather have that kit than just the ART pipes. I'll see if I can return them. Thank you very much for your help! I appreciate it! 🤝🙏

[@bangarang3810]

Would this be doable on the m37 too?

[@ibrahime316]

I am looking to buy this, will it fit my QX70s 2015 VQ37HR ?

[@devinespinoza5529]

Why it does not work for AWD? The more power the more traction needed

[@Z1Motorsports23]

The Z1 Headers will not clear and AWD. The test pipes and power mod; however, will fit an AWD.

[@Ash-bx6kq]

Is there some kit like this for 350z

[@Agenthutchins]

It’s not a 400 package but we do have a bundle kit that includes some similar upgrades for both DE & HR models.

[@xxk4rilsxx]

@@Agenthutchins This

[@Agenthutchins]

xxk4rilsxx the 3.5 HR kit is here: www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@monkejr3522]

Do I need to upgrade my fuel injectors ?

[@tittttttttttttyyyyyy]

Make one for the 350z!!

[@Z1Motorsports23]

*AHEM* www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@jtolentino1227]

will these parts fit the M37 model? Since the M37 shares the same engine (VQ37VHR) as the G37, 370Z?

[@Z1Motorsports23]

We have not yet been able to confirm fitment of the headers on the M37's, however we suspect it will fit. The upper plenum well for sure fit.

[@philipsimeon8745]

Does this fit a 2009 g37s convertible bc looking to buy this package

[@andywu8558]

Does this work on the nismo 370z?

[@philloft]

Thats 400 crank hp right assuming wheel hp is 360 ish with a tune.

[@Chris-pt6hh]

If only there was a video where someone would talk about that...

[@kevinz1418]

Yes crank hp and about 320-335whp with a good tune

[@shad3128]

Correct- 360 would be on the high side if really good tune. Getting these at 400+ to the wheels needs forced induction

[@philloft]

You know I wonder if I built the bottom of the my vq37 maybe bore out to an even 4 liter or 4.2 with forged pistons rods crank with the airflow bolt ons ( CAI, intake manifold, headers, exhaust ) if 400 hp + is achievable without forced induction ofcourse a tune will help along side a fuel system increases compression ratio . Have the engine able to rev at 9k . Now that would be a unique build. It may not be the most number happy build but keeping the VQ NA and reving over 8500rpm would be pleasurable.

[@georgeruiz4414]

Phil Loft u could easily achieve over 400whp on a built Vq, if anything it’s for sure going to be over 380ish whp

[@torvarrisevans3961]

Hi , dose z1 plenum add hp to a stock g37

[@Hondacbr600rrish]

Should I bolt this on my 08 g37s coupe and heard a rumor that the first gen 2008 infiniti g37s has a galley gasket problem, is this true?

[@Z1Motorsports23]

The gallery gasket issues exist for all '08-14 VHR's. This kit won't have any effect on the gallery gaskets

[@Hondacbr600rrish]

@@Z1Motorsports23 ok thanks. I usually use the car for a daily driver. I was just curious cause some people have over 150,000 miles on their g37 and no issues. As a g37 owner I'm basically waiting for gasket to blow? Lol 😅

[@Subninja2012]

Except currently the upper and lower plenum are on back order for 3 to 4 months.

[@dannys69]

how much will I be refunded for sending back the stick plenum

[@smttyschannel4940]

Is the gas mileage good?

[@sethuser1731]

Can you use this for automatic?

[@crod6431]

Where can I get this installed?

[@ganglandlandlord9870]

Shootout to the car in the dyno in the back shooting flames

[@sk8punk318]

Considering an engine is basically an air pump and these parts in the package just make everything less restrictive you’re really going to need a better intake(oem is still good but still needs to breathe more) and with more air you’re gonna need a better flowing exhaust then a tune to really Complement this package

[@DiegoFuerte]

Is the Injen Catback a good option?

[@krisreyes2434]

I bought this, I’m just missing the tune and man... day and night difference on my 370!

[@kafaya77]

where r u from? I want to get this but i'm from CA

[@WiiGotchaa]

Can you tune it just like that with that package & still get 400hp or should I change injectors and fuel pump too?

[@AM-wi6zo]

@@WiiGotchaa You just need a good exhaust on and this kit and tune it. Should make close to the 400 crank

[@angelamaya3252]

2008 350z hr packages?

[@Z1Motorsports23]

www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@kurthutchinson7553]

How abt some sauce for the Q50s 3.7? 🤦🏻‍♀️

[@unalike8052]

Would these parts fit in a g37xs

[@overv434]

No

[@pghg3795]

So this won’t fit an awd g37?

[@Z1Motorsports23]

Unfortunately not, the headers will not fit AWD models.

[@rockinghamlab634]

400 hp. Street legal pkg. ?

[@marcelohernandez2366]

Anything for a vq35de?

[@dinky19810]

M37x?

[@SirYensid]

Sorry I am a noob just getting into this game. I use my car as a daily driver will this have a issue when passing smog?

[@sparco023]

Yes sir it will.

[@JesusMorales-wp9gz]

1 comment

[@doggystyledave]

I am excited to see the video but I am still disappointed that I can't find clear info anywhere about how this fits the 2014-2015 Q50. I see your responses on the web site saying "yes it does." I have spoken to someone at your location a few times and have had quotes sent to me. --> I am under the impression that I will need your Z1 headers and DE test pipes or HFCs--- Then I can put any VQ37VHR cat back exhaust on. When I open your Z1 HFCs for G35 and put the pic next to the Z1 HFCs for G37/370Z, the flanges look exactly the same. This is also the same for multiple web sites I have scoured over the months. Q50 forums have no answers--- Everyone says to "go FI for real power." Facebook forums have no answers-- nobody really knows. Stillen said they would not fit. I REALLY want to put a FULL EXHAUST on this Q50 next month. I wonder WHO can install these headers in Austin (I'm looking around).

[@user-jh6ts6tt5y]

anything for z32 ?

[@jerealms]

Will this work with 2009 g37x sedan? If not do u have a kit for that model?

[@Agenthutchins]

jerealms unfortunately nothing for AWD at this time.

[@calebwright2849]

At this point I do not understand why the hell they still sell de headers for the hr/vhr. I get it 12 years ago but what is so difficult for them to change the flanges now. The de was used from 02‐07, we have had the hr/vhr from 07 to now. It makes no sense at all.

[@davidvasta]

So this kit will delete the CATS and I will not be able to pass emissions tests?

[@AM-wi6zo]

That's why It's an off road set

[@mrnotaloka46]

Does it fit the infiniti fx37? Please let me know really interested on this

[@Z1Motorsports23]

We've never tried to fit the headers on an FX37 and aren't aware of anyone that has. It's 'possible' that they might fit on a 2WD, we can say with absolute certainty that they will NOT fit AWD models.

[@Mokujo]

This'll work with any of the V36 models, right? My G35 is a V36 with a VQ35HR so I'd assume...

[@Agenthutchins]

Mokujo you have a different plenum. You will need our HR package for a simple bolt on install. Otherwise you can swap the lower plenum and rails from a VHR. It’s a pretty popular conversion these days.

[@krishuggins8543]

also curious......

[@Z1Motorsports23]

Your G35 HR Sedan will use this package. It's essentially the same kit but it includes the HR plenum. >>>> www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@peytonchmielowski2663]

will it work on a g35

[@austin4700]

So I guessing you cant use this with awd version the g37x?

[@Z1Motorsports23]

Unfortunately not, the headers will not fit AWD models.

[@username7208]

does this apply for a 2015 Infiniti Q60S limited as well? Also, can I use these for daily? haha

[@spencerpecha3719]

If you have no emissions regulations in your state technically yes but it will be super loud and droney

[@username7208]

@@spencerpecha3719 fuck I'm from California

[@username7208]

@@spencerpecha3719 you're also saying this kit doesn't pass smog?

[@spencerpecha3719]

@@username7208 the test pipes replace the cats so yes it will fail smog i feel sorry for you man here in Nebraska you have free reign on your car no noise laws or smog testing

[@username7208]

@@spencerpecha3719 ah alright, thanks so much for replying and your tips, hope you had a great Christmas, and a great upcoming New Year! =D

[@DailyBeater]

What's the difference between the newer and older vq37vhr's?

[@ThoseModdersHD]

Tarik Laaraj nothing lol

[@DailyBeater]

@@ThoseModdersHD I figured this, that makes no sense what he said

[@Agenthutchins]

Tarik Laaraj 13+ models have revised exhaust manifolds, also we have noticed some slight differences in the heads.

[@DailyBeater]

@@Agenthutchins what difference in the heads?

[@Agenthutchins]

Tarik Laaraj the most evident is a change in valve spring design but we are suspect there is a little more. We know these later engines all make more power stock and when upgrades compared to their earlier mode siblings, even after their exhaust manifolds are changed to the same headers. We see more late model cars make power beyond 345+ whp with these somewhat standard mods & tuning.

[@jacobgonzalez6961]

Do one for the 350z HR

[@Z1Motorsports23]

We have a similar package for the HR found HERE: www.z1motorsports.com/z1-products/z1-motorsports/z1-vq35hr-na-power-package-p-11417.html

[@k-a147]

One day

[@nathanaelaudate7845]

When will Z1 make turbo kits?

[@overv434]

They do

[@Zswag22]

Can the VHR37 heads be ported and polished?

[@Z1Motorsports23]

Sure, any competent machine shop should be able to work with the heads off of a VHR although they flow pretty well from the factory.

[@robertpal9]

If this makes 348 whp why is it advertised as 400?

[@STILLNIGHTPEARL]

robertpal9 400 to the crank, then minus 15% once it goes to the wheels, generally.