Z1 Motorsports High Pressure Radiator Cap

Way better than stock.

Old one leaking this fixed leaked do its job nicely

Fits & does the job perfectly!!

Gives the engine bay more aesthetics

It was time to replace my factory original radiator filler pressure cap. Yes, Z1 came through perfectly.

Shipped quickly and fits perfect…

Super simple , my old one was cracked. I like the z1 sticker on it with a label warning on it rather than no warning label

Just installed on my 2015 q50s makes engine bay look cleaner but necessary wouldn’t say made a huge difference in performance mainly cosmetic mod if anything definitely recommend

Just installed on my 2015 q50s makes engine bay look cleaner but necessary wouldn’t say made a huge difference in performance mainly cosmetic mod if anything definitely recommend

Easy to install and gives a good little touch

While I’ve not seen any improvement in cooling running these caps, that may just be me and my applications. I remain satisfied with the purchases and the quality Z1 ensures in all of its products!

Fits great, no issues. Using it on the NVA radiator.

I’m very happy with your products guys. Keep going make it happy for customers.

Love it fits perfectly like oem

Quick and Easy install for a cleaner look under the hood.

Put off replacing my cap a few years after recieving this, luckily i had it in my car when the oem one failed. Saved me. I should buy another.

Just installed this new Z1 High Pressure Rad Cap, looks fantastic along with all the rest of my Z1 engine upgrades. To be honest, I haven't noticed any difference in my coolant temp, but thus far has performed perfectly, definitely has an OEM fitment & quality feel to it.

Fits perfectly and looks great

Thankfully resolved my issue. My coolant was leaking from my original radiator cap, so start simple in the case you’re having a leak that can’t be spotted. I noticed the cap is heftier and better quality than oem! Would recommend even when your radiator cap is still functioning.

Perfect piece to finish off my cooling system refresh ✌🏻

Never had any problems with it I’d recommend.

Fitment was spot on and a nice upgrade from the cap that came on my CSF radiator.

Better quality than OEM Q50 2022. Although the spring part is the same, the cap part is thicker and the sticker looks nicer!

Put this cap on and water stays in. Direct fit as you would expect from Z1.

Cool look and feels snug as it should.

Looks Good. No Complaints

Works great Love to fit and finish.

Looks great and increases the pressure of the coolant; helping prevent against cavitation. Easy mod for a little extra safety/insurance.

Never tested the limits of this product but it’s a great quality and the Z1 logo looks cool in the engine bay.

Works great and fits well

made the temperature of my car more stable

Looks good under the hood.

Ordered Saturday and delivered Monday!!!! Amazingly fast service and the product is serving its purpose. Will be ordering again.

Looks neat on the engine bay

has a decent label on it ..shouldnt melt or bake to soon

No nonsense product. Its Z1 so it’s definitely of quality

Necessary upgrade, z1 just looks good under the hood!

Nice replacement for worn out OE parts

Cool little upgrade mod

Great product,great quality as always.

Better quality than OEM, Fit perfect! Fast delivery

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

Good quality and does the job. My old one leaked coolant haven’t had a problem with this one since I changed it!

good quality, good material, nice

Top tier quality. Highly recommend

Looks great in my engine bay!

Does what it needs to do. No issues.

Good quality l. I also purchased mishimoto lower temp thermostat.

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.

Looks 10x better😎I DEF recommend it 🤘🏻

Yes 10/10 I would recommend

It is what it is. Z1 goodies

Welp fellas I didn’t see any gains In hp or torque only street cred. 😀

Fits tight, looks good. Can't complain! Good buy

Love the item Great price Great product Look forward to buying more parts for my G37 off you guys

Exactly what I expected

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.

Perfect addition to my HR build

didnt notice a difference but still makes the engine bay look better

Just as advertised. Fit perfect.

Good OEM replacement with the look

Would definitely order it again worked great like I needed it to.

Solved the leaking oem radiator cap.

Excelente producto muy eficiente

this cap has one of the best qualty I ever use on my car

11-27-22 First Quality!

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!

Good OEM replacement.

Awesome product! Thank you!!!!

Great quality awesome looking

Looks great in my vehicle.

Great fit and upgrade. Not too difficult to install.

Best purchase if your old radiator cap is old

Provides peace of mind when dealing with modified Gs/Zs in a hot environment.

Item received well as described. Have yet to install so cannot comment on effectiveness. Definitely looks better than stock that's for sure.

Keeps good pressure in the radiator

needed to replace mine and this was a great upgrade

grabbed it just to spice up the engine bay but honestly im sure it does help

simple and cheap mod! great value

Wonderful quality cap, works well and looks great, value for money.

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.

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.

Works as it should? Nothing is spraying out!

Z1 everyday every day ! Looks great ! And nice update to the engine bay

FITS AND LOOKS GREAT, I LOVE IT!

Way better then oem one!

Does exactly what it’s intended to. If you have. Worn out cap this is the perfect replacement.

A good inexpensive mod.

Great Cap, Looks cool! Works Great

right part good price

Great product and made a difference on my cooling thank u z1

Works great Looks great too

I have a stock cooling system and this cap has been on for 20k+ no problems

It really works, get it. You will not regret it.

Works great! Better than OEM

Installing my new Z1 Motorsports High Pressure Radiator Cap was like putting the cherry on top of my build.

Works just as advertised. Maybe even better.

Z1 sticker on the radiator cap adds 10 HP for sure. Fits like OEM.

Haven't had any issues with it. Looks alittle better then an oem one.

Didn’t necessarily need this item but it looks great and well worth the money

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?

Reworked my whole cooling system and this thing was a key!!

Great product! Was having some leaking with oem caps. Purchased these high pressure z1 caps and problem solved!

Perfect fit good replacement for doing maintenance

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.

I have seen no difference with this cap verses the factory cap

Bought as a backup, same pressure as Z34 stock item with added 15hp due to Z1 logo

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 👍🏼

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

Excellent product, works as described. Fit and finish very good and also lightweight.

Fit perfectly! Great product from a great company.

Fitment is perfect, Cap looks great, and the price is only a tiny bit higher than OEM which is excellent.

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!

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

better than nismo... best replacement and great value for the money

Great product. Had on my car for almost 15k, nice cheap upgrade. You've spend $20 on something worse. Highly recommended

Very good quality! As described. Easy to use with Howe Radiator!

Excellent construction. Definitely tighter spring tension. Recommneding upgrading/replacing all old worn out hoses to avoid any unexpected coolant leaks.

Great quality,great looking radiator cap,easy engine dress-up

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!