Z1 Motorsports High Pressure Radiator Cap
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Z1 Motorsports High Pressure Radiator Cap

starstarstarstarstar_half 4.9/5 - (92 Reviews)
Fits models: 300ZX / 350Z / 370Z / JUKE / G35 / G37 / Z / ...

Product Description

The Z1 High-Pressure Radiator Cap fits various Nissan and Infiniti models, including the 300ZX, 350z, G35, 370Z, Q50, Q60, and '23+ Z.

Radiator caps have a spring-loaded valve and seal that keeps a small amount of pressure in the cooling system and acts as a relief as pressure rises above normal. By increasing the pressure within the coolant system, you raise the boiling point of the coolant. This prevents cavitation caused by localized boiling as engine temperatures rise and provides a bit more insurance against damage caused by overheating in cars used in more demanding scenarios. Located on the radiator or pressurized coolant reservoir, the Z1 High-Pressure Radiator Cap replaces the stock cap which has a factory relief pressure of 1.2 Bar (17.4 PSI) with a relief pressure of 1.37 Bar (19.9 PSI).

Produced with OEM quality, but with the performance advantages of an aftermarket radiator cap.

Sold individually.

 

*** This item does not qualify for any additional discounts or promotions ***

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In stock, ships within 1 business day. 
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Price: $29.99

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What our customers say

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John
June 25, 2024
Never tested the limits of this product but it’s a great quality and the Z1 logo looks cool in the engine bay.
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Carlye
June 15, 2024
Works great and fits well
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JohnPaul
May 10, 2024
made the temperature of my car more stable
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Elvin
May 2, 2024
Looks good under the hood.
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Josh
April 6, 2024
Ordered Saturday and delivered Monday!!!! Amazingly fast service and the product is serving its purpose. Will be ordering again.
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Saad
March 26, 2024
Looks neat on the engine bay
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Tyler
March 5, 2024
has a decent label on it ..shouldnt melt or bake to soon
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Jethro
February 27, 2024
No nonsense product. Its Z1 so it’s definitely of quality
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Ramiro
January 24, 2024
Necessary upgrade, z1 just looks good under the hood!
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Chris
January 1, 2024
Nice replacement for worn out OE parts
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EDUARDO
November 17, 2023
Cool little upgrade mod
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Seyhan
November 11, 2023
Great product,great quality as always.
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Fernando
November 11, 2023
Better quality than OEM, Fit perfect! Fast delivery
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Chavez
October 18, 2023
Car was leaking coolant from the top. After realizing the system needed to be burped we replaced the original cap with this one because I'm boosted and it does the job
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Evelina
October 17, 2023
Good quality and does the job. My old one leaked coolant haven’t had a problem with this one since I changed it!
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Ronnald
October 2, 2023
good quality, good material, nice
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Joseph
September 16, 2023
Top tier quality. Highly recommend
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Brandon
August 17, 2023
Looks great in my engine bay!
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Michael
August 8, 2023
Does what it needs to do. No issues.
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Oscar
June 11, 2023
Good quality l. I also purchased mishimoto lower temp thermostat.
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Vincent
May 31, 2023
I bought this for the same reason as the oil cap to make the engine look a little bit better that's why I bought the black one because I didn't want to much flash.
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Ludwin
May 26, 2023
Looks 10x better😎I DEF recommend it 🤘🏻
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Abdulmatin
May 21, 2023
Yes 10/10 I would recommend
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Mirdock
May 13, 2023
It is what it is. Z1 goodies
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Theodore
May 10, 2023
Welp fellas I didn’t see any gains In hp or torque only street cred. 😀
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Michael
April 28, 2023
Fits tight, looks good. Can't complain! Good buy
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George
April 9, 2023
Love the item Great price Great product Look forward to buying more parts for my G37 off you guys
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Jason
April 6, 2023
Exactly what I expected
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Daniel
April 5, 2023
For how small this piece is it definitely looks cleaner than oem. Just went outside, took the oem cap off and threw this on. Took a minute, no way for me to notice any difference in pressure honestly got it for looks.
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Anthony
April 2, 2023
Perfect addition to my HR build
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Chase
March 28, 2023
didnt notice a difference but still makes the engine bay look better
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Ivan
March 27, 2023
Just as advertised. Fit perfect.
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Stevens
March 25, 2023
Good OEM replacement with the look
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Alejandro
March 18, 2023
Would definitely order it again worked great like I needed it to.
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Pete
January 24, 2023
Solved the leaking oem radiator cap.
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Luis
January 4, 2023
Excelente producto muy eficiente
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JUNIER
November 29, 2022
this cap has one of the best qualty I ever use on my car
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DOUGLAS
November 27, 2022
11-27-22 First Quality!
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Scott
November 27, 2022
Got the Z1 high-pressure radiator cap to replace the OEM part which felt very loose. Cap feels snug and looks great with the Z1 hose set. I bought my G35 with high miles and a recently replaced radiator, so I wanted to upgrade the rest--Z1 got it done!
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Robert
October 31, 2022
Good OEM replacement.
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Joshua
October 27, 2022
Awesome product! Thank you!!!!
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Mikhail
September 12, 2022
Great quality awesome looking
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Winston
September 5, 2022
Looks great in my vehicle.
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Arthur
September 4, 2022
Great fit and upgrade. Not too difficult to install.
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Radon
August 21, 2022
Best purchase if your old radiator cap is old
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Scott
July 23, 2022
Provides peace of mind when dealing with modified Gs/Zs in a hot environment.
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Shaun
July 22, 2022
Item received well as described. Have yet to install so cannot comment on effectiveness. Definitely looks better than stock that's for sure.
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Stacy
July 19, 2022
Keeps good pressure in the radiator
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Saul
July 1, 2022
needed to replace mine and this was a great upgrade
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Chris
June 24, 2022
grabbed it just to spice up the engine bay but honestly im sure it does help
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Miguel
June 11, 2022
simple and cheap mod! great value
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Philip
May 30, 2022
Wonderful quality cap, works well and looks great, value for money.
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Gage
May 17, 2022
Looks great no problems so far. Installed on a mishimoto G35 radiator with no problems. Fitment is a little tight but on a high pressure device that’s a good thing.
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Kyle
May 9, 2022
Hard to say exactly what's good about this product, it looks good, it fits. How much does it drop the temp? Without a high res gauge, I couldn't say. My temps haven't got any higher. But for the low price and the extra 10 HP from the Z1 logo, I'd say its worth it.
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Daniel
April 29, 2022
Works as it should? Nothing is spraying out!
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Abadi
April 28, 2022
Z1 everyday every day ! Looks great ! And nice update to the engine bay
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Dustin
April 18, 2022
FITS AND LOOKS GREAT, I LOVE IT!
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Carlos
April 7, 2022
Way better then oem one!
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Rickey
March 25, 2022
Does exactly what it’s intended to. If you have. Worn out cap this is the perfect replacement.
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Patrick
December 21, 2021
A good inexpensive mod.
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James
December 11, 2021
Great Cap, Looks cool! Works Great
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Matthew
November 9, 2021
right part good price
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Jose
October 25, 2021
Great product and made a difference on my cooling thank u z1
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Luis
October 9, 2021
Works great Looks great too
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Anthony
September 8, 2021
I have a stock cooling system and this cap has been on for 20k+ no problems
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Fabian
September 4, 2021
It really works, get it. You will not regret it.
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DAMON
August 12, 2021
Works great! Better than OEM
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Marcus
August 10, 2021
Installing my new Z1 Motorsports High Pressure Radiator Cap was like putting the cherry on top of my build.
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Roberto
July 26, 2021
Works just as advertised. Maybe even better.
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David
July 20, 2021
Z1 sticker on the radiator cap adds 10 HP for sure. Fits like OEM.
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Adam
July 14, 2021
Haven't had any issues with it. Looks alittle better then an oem one.
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Jeff
June 27, 2021
Didn’t necessarily need this item but it looks great and well worth the money
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Jeffery
June 25, 2021
I replaced much of my cooling system and this cap goes great with the new all aluminum radiator. Does what I need it to, plus I get to show off Z1! What's better than that?
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Michael
June 3, 2021
Reworked my whole cooling system and this thing was a key!!
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Edwin
May 11, 2021
Great product! Was having some leaking with oem caps. Purchased these high pressure z1 caps and problem solved!
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Elijah
April 26, 2021
Perfect fit good replacement for doing maintenance
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Justin
March 28, 2021
Looks better than OEM. It fit in the radiator but at high temp my cap was leaking coolant all over. Might just have been a defective cap, or a defective mechanic! Got a new cap with my new mishimoto radiator anyways.
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Adam
March 14, 2021
I have seen no difference with this cap verses the factory cap
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Beau
February 13, 2021
Bought as a backup, same pressure as Z34 stock item with added 15hp due to Z1 logo
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Ricardo
February 9, 2021
Z1 the world! Loving my new radiator Cap. It’s always important to replace little parts like the radiator cap. Specially after so many years of use they can start leaking, what’s better than a Z1 radiator cap to replace the old one 👍🏼
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Scott
February 4, 2021
If you plan on upgrading your cooling system you will need these. Even the nismo caps gave me leaks. Strapped these suckers on and never had an issue
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Jorge
January 25, 2021
Excellent product, works as described. Fit and finish very good and also lightweight.
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Gregg
January 25, 2021
Fit perfectly! Great product from a great company.
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Tyler
December 7, 2019
Fitment is perfect, Cap looks great, and the price is only a tiny bit higher than OEM which is excellent.
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Zachary
November 9, 2017
Excellent cap, good piece of mind for those hot summer days. Only issue is the sticker on top did not last long, no big deal as I covered it with a cap finisher. Otherwise it's been great!
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Angel
April 3, 2017
ok heres the deal. love what i got but you will not see a tempature drop unless you have a quicker opening tstat like mishimoto as well as an all aluminum rad or a larger one. also if your rad is a bit old and you like to get on it a lot you run the posibility of cracking the plastic fill neck on the stock rad. exactly what happen to me but not mad at all about it. of course higher pressure means risk of weak points breaking. also one the coolant will boil off when the cap does open up so watch your collant level especially if you like to push your car like myself. great product but a good idea to purchase supplemental upgrades with it to take full advantage of what this cap offers! this is i believe the highest pressure cap you can get for a stock rad and im literally looking for radiators that have a stock style neck so i can make sure i use this bad boy lol. love it! have the mishi tsat now and gettin rad soon then will install all at once and ill be comfortable knowing my engine will literally never over heat no matter how hard i drive her unless some other unrelated part goes like a pump or belt. just fking buy it already bro lol
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Ricardo
November 21, 2016
better than nismo... best replacement and great value for the money
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Matt
March 15, 2016
Great product. Had on my car for almost 15k, nice cheap upgrade. You've spend $20 on something worse. Highly recommended
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Artem
July 23, 2015
Very good quality! As described. Easy to use with Howe Radiator!
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John
July 18, 2014
Excellent construction. Definitely tighter spring tension. Recommneding upgrading/replacing all old worn out hoses to avoid any unexpected coolant leaks.
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Kelly
May 30, 2014
Great quality,great looking radiator cap,easy engine dress-up
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Brandon
May 2, 2012
Great Looking Radiator Cap. If I'm not mistaken has the highest relief pressure rating out of any radiator caps I've seen. Great Job Z1!