Z1 350Z / G35 VQ35DE Plenum Spacer - Z1 Motorsports - Performance OEM and Aftermarket Engineered Parts Global Leader In 300ZX 350Z 370Z G35 G37 Q50 Q60
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Z1 350Z / G35 VQ35DE Plenum Spacer

starstarstarstarstar_half 4.8/5 - (60 Reviews)
Fits models: 350Z / G35 / FX35 / FX45

Product Description

Increase your 350Z or G35's performance with the Z1 Plenum Spacer!

This angled aluminum plenum spacer for your 350Z - G35 VQ35DE is specially designed to increase airflow to your engine while allowing you to keep the factory strut tower brace.  Raising the plenum provides increased air flow to the front cylinders. The direct result is noticeable gains in mid range torque and in top end power. This plenum spacer is the best horsepower upgrade for the money, and combined with other supporting mods and tune can net you a good deal of extra horsepower. This plenum spacer is a tapered design and raises the plenum 5/16''-1/2''.

Includes:

VQ35 Plenum Spacer - 350 Red

View Z1 Motorsports' Installation Manual HERE.

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

Quantity:

List Price: $235.00
Special Price: $208.00
You Save: $27.00 (11%)
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Z1 350Z / G35 VQ35DE Plenum Spacer
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Questions our customers have asked

What size is this spacer?
It is an angled spacer. 7/16th to 3/8th.
Wouldn't you need 2 oem plenum gaskets?? One for under the spacer and one for above it?
We include one gasket specifically for the top of the spacer. We reuse the the lower metal gasket. If you wanted to add a fresh lower gasket we have them available here: (Link)
I bought this set a while back and now I cant seem to find the rubber pieces. I see you have the gasket priced at $28.00 which i will likely need but I also need the (6) M6 Washers w/ Bonded Seal. Are these sold separately? Are you guys able to source them?
Hi Will thanks for the inquiry! We now have these available for online purchase at the link below. We have these in stock and ready to ship. Thanks for your patience! (Link)
i bought this 4 years ago, ive had the plenum off a few times now. Can i purchase just the washers with rubber on them? mine are shot. thanks
You sure can Joe! Follow the link below and it will take you to the bonded washers. Thanks! (Link)

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What our customers say

See all reviews
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Jackson
June 15, 2021
It would make more sense to have another gasket to go with and hardware could use an upgrade for the price especially if your in Canadian because shipping from them is pretty brutal otherwise good product
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Ryan
June 9, 2021
Did this in 1 afternoon, comes with everything you need, sounds better and opens up midrange power. You’ll need to mess with the strut bar because if not, the plenum will touch it when revving so you’ll need to adjust it. I was able to even reuse the plastic engine cover after messing with the strut bar for a couple miniutes.
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Matthew
June 9, 2021
Good product, but the only problem is that it is causing my car to run lean, and now I need to find a shop to tune the car.
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Michael
June 8, 2021
Love the spacer. Can feel a better response
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Edwin
June 3, 2021
Got this for my fiancé & you can definitely feel a big difference on top end we have a custom exhaust on the G35. This spacer made it sound deep nice tone exhaust! Deserves a 5 star rating 🙏🏽
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Elijah
May 19, 2021
Easy install the set didn’t come with enough sealed washers so I had to make my own beside that noticeable difference in tone of car
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Chase
May 15, 2021
Works great just like I thought it would.
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Eddy
May 6, 2021
Loved it really easy install
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Joseph
May 4, 2021
Very easy install and works as advertised
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Corny
April 30, 2021
Great product, better fuel economy, better throttle response and more power at higher rpms.
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Philip
April 26, 2021
you can feal the differeance with this mod. not hard to install.
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Philip
April 20, 2021
Great product much better than the OEM struts I would highly recommend.
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Brandon
April 20, 2021
Great ! Easy install and can definitely wake your g up !
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Quincy
April 17, 2021
I ordered this before I got my UpRev tune. Shipping was fast. The spacer was easy to install and it was a perfect fit to the plenum. Customer service answer any questions I had about installation.
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Matthew
April 11, 2021
Instructions that were provided, lifesaver. Great product and it complements the throttle body I purchased. Car breathes better and you can feel some HP out of this mod. Great product
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Saul
April 11, 2021
Really glad I got this product for a good price and quality
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William
March 26, 2021
Awesome product!! I always said the Z should have come with this! Definitely allows a bigger opening for better breathing.
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Shane
March 12, 2021
Arrived well packaged and upon opening and inspecting I am very happy with this product.
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Jose
March 10, 2021
Wasn't sure whether this was worth it but when I found out it works even better for revups I felt like I had to get it and I don't regret it. Quick solo installation and I am feeling more responsive throttle but that's including other mods as well.
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James
March 10, 2021
I upgraded to this from a plastic blox spacer and what a difference in quality and fitment The only thing i wish is that it came with all new hardware for the plenum instead of re-using sone of the oem bolts. But no big deal!
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William
February 20, 2021
I bought this 1/2" spacer for a 2006 Nissan 350z, and after about an hour, it was installed. Upon starting my Z, it sounded more throatier, and when I took off, I immediately felt a difference in the acceleration, especially in the mid range. I am very well pleased with this product, and the instructions were very on point. Don't forget, buy some copper permatex, and put a good seal on top of the existing gasket before placing the spacer in. After placing two washers on each strut bolt, my strut bar went over my engine without touching my hood. This is the first of many upgrades.
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Mark
February 11, 2021
Not your average placebo mod. Will make yo Z woke tf up. Good modification Ftw!!! Thank you z1motorsports
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Thomas
February 11, 2021
Great quality spacer. Backed up with the Dino benchmark (see the Banana Build vid). I also paired this with cold air in-take and Motordyne’s ISO Thermal Kit… detailed Instructions easy to follow. Most of the time was spent cleaning the lower and upper plenum prior to reassembly.
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Justin
February 11, 2021
Love it so much guys!! Thanks again. definitely recommending to all my buddy’s. Really wish I could get some stickers to put on my cars . That’s a lot god bless.
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Eric
February 10, 2021
The spacer is very well designed and manufactured. A few suggestions though: 1) Add to the instruction sheet that when installing the spacer, be sure to check that the oil filler cap collar is not stuck between the spacer and the intake - seems to be a common issue, and I ran into the same thing. 2) Provide screws for all the holes so they all match, or source screws that will appear like the oem screws for consistency. But otherwise, a fantastic product!
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Eric
February 10, 2021
This is a must for any VQ35DE I installed it when i got home from work in maybe 30 mins went on nice looks good and the you can really feel a difference in the car you definitely have to mind you foot
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Erick
February 9, 2021
Installing took about 20 min. Definitely felt better throttle response and made my exhaust louder worth the price i think
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LeTroy
February 9, 2021
Great product, came with everything I needed and even plenty of spares. Installing this gave the mid to high end rpm a Much lower tone at WOT. The Z Tube gave the low end the same effect but struggled to flow air without the spacer. Overall very satisfied and worth every penny
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Jermaine
February 9, 2021
Best bolt on for noticeable gains. Quality part. Instructions were easy to follow
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Eric
February 9, 2021
For sure feel more power and torque as my butt Dyno feels. I love it!
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Hunter
January 27, 2021
This thing is mint. It’s 9/10 doctors approved the 10th doc has a genny (he’s just salty because the other 9 who drive VQ cars always beats him after they added the spacer) it even helps on gas mileage. NOTE : I am not liable if ur VQ car doesn’t beat a genny after the plenum spacer. :)
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Stephen
January 27, 2021
Easy install and adds a noticeable punch around 3k rpm. Only issue I had was I had to use 2 of the longer spare bolts that came with the kit instead of using the stock bolts(per insructions) as they were too short and didnt hold the upper plenum down.
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Preston
January 27, 2021
Great product, made the car feel a bit more responsive after it was tuned with it
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Eric
January 26, 2021
Easy to install and butt dyno tested. Waiting for tune for final opinion.
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Kevin
January 26, 2021
Great quality! Had no issues while installing, pretty sure it will make a good difference for performance. Can’t wait to drive it!
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Morgan
January 26, 2021
Install was fairly simple and i could actually feel a power difference. Installed on my 05 350z DE non revup.
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Andrew
January 25, 2021
For the win on DE motors. Easy enough install. Great sound.
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Kevin
January 25, 2021
Easy install also after 4 rpms car feels a bit quicker no dunk yet.
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Laura
January 25, 2021
Love it! Put it on my 350z DE which only had an air intake upgrade, and there's def a noticeable sound difference, along with more power after around 2.5-3k rpms
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Patrick
October 23, 2020
did not really notice a acceleration improvement, But averaged 24 MPG on a road trip. Have a 2004 FX35AWD, factory specs says 20MPG. AT 4 MPG pay for itself real soon.
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Richard
July 16, 2020
Z1 350z Plenum Spacer *** DO NOT BUY THIS *** WELL, no amount of RTV / re-engineering will fix this - when the NEW outer ring spacer is applied (the kit lift spacer) a lack of seal between the upper/lower intake at the inside stacks occurs (those 6 tubes inside) ---- it causes a leak to occur at the top of the head of the bolt and the bottom of the lower intake - even if you seal, thread lock and rubber gasket both ends. Having been tuning and modifying cars for over 20 years, this is the single kit, I unfortunately have to say - does not work. Tired of trying to make it work, and clear engine vacuum codes…. back to stock - having invested 40+ hours of wrenching and an additional $30 in small parts and RTV/washers/gaskets. Z1 Engineering problems * fully threaded bolts were included in my kit, the ‘lack of’ a smooth shank allows air to pass through the threads (I did NOT get what was pictured by the Z1 site) * lack of a spacer on the internal stacks, to properly join the stacks on position 1, 2, 3, 4, 5, 6 inside * the instructions state positions of nut/stud 12, 17 will not be re-used, or the stud can be removed - this is not accurate, a proper seal is required evenly all around the spacer to ensure proper vacuum seal at full load * this KIT will not allow the re-use of the factory strut bar - after taking all this Z1 kit off and returning to stock… I actually broke a strut brace bolt (something that would not have happened if the kit worked right the first time) * my KIT was missing bolts as well This kit, has become a lovely piece of automotive art on my shop wall - a reminder that “more power” is a pain, when the KIT supplied has missing/wrong/lack of properly engineered parts… I will now for the rest of my days, have a story to tell my friends about that shiny thin on my shop wall.
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Tyler
April 17, 2020
Don’t be like me and over torque the bolts. I thought it said foot/lbs and not inch/lbs.
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Dean
January 27, 2020
Easy 5 stars. Took me a couple hours because of inexperience with working on cars, but really any driveway mechanic can do this job. Can feel the extra power over 3000 rpm.
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Robert
October 25, 2019
I ordered this 2 days ago came in the mail today so super fast shipping I put it on in like 45 mins and let me tell you this feels so amazing and DEFINITELY changed the note of my exhaust to a deeper sound I couldn’t be any happier !!! Thank you z1
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Seyhan
January 3, 2019
Bought and installed the intake spacer on my First Gen FX35,driving it normal you can’t tell much off a difference but after 3000 rpm she definitively pulls much harder then before! My intake air temps are about 5-10 degrees cooler also.Great products at a great price.Awesome team. Thanks Z1!
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Carlos
November 29, 2018
really high quality peace the best plenum spacer for the de hands down
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David
February 14, 2018
Spacer kit came with its proper tools and made installment simple following the directions it came with. The only thing is my OEM strut bar did not fit well with the few washers it gave me. Be prepared to have M10 30mm longer bolts and Thicker washers just in case, because the Strut bar is considered a separate fix. Other than that, the spacer works great and gainned lot more mid-torque. 04 350z
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Jeremy
September 10, 2017
shipping was very fast. very satisfied with my VQ35DE Plenum Spacer. will do business with you guys again
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Brandon
August 11, 2017
This is one of the most common modifications for the VQ35DE motor. I installed it on my 350z and I noticed a deeper engine sound at higher rpms especially at full throttle. I can also tell there is an increase in acceleration response above 3000 rpm. This was a simple install to do except adjusting the strut bar with the washers. Overall, I'm pleased with the results.
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Andrew
April 7, 2017
If you are reading all these reviews, it probably means you are on the fence about clicking the add to cart button... just go ahead and click it! I was also on the fence about ordering this for a very long time. I finally bit the bullet and ordered it... I should have done this YEARS ago. This is the best $170 dollars I have ever spent on my Z! You know how there's those mods you do where you think you maybe can feel a difference but you aren't sure? Well this isn't one... I instantly knew this made a huge difference in mid and top end HP and torque. It definitely feels much stronger. I'm not going to say it's some crazy power gain, but it is definitely noticeable. Just make sure you do the ECU reset. Also when installing be sure you don't pinch the rubber seal around the oil cap between the plenum and spacer, or you will have issues! This is a very simple and extremely satisfying mod to do for a small amount of cash. Once again, a other great product from Z1 motorsports that has put a big smile on my face!
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Jeremiah
February 17, 2017
Your product works way too well. I noticed immediate throttle response upon installing. I was shocked how well this mod works. Thank you z1, I am so thrilled! Also shout out to Z1 for including the instructions to install, youre the real MVPs.
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Israel
December 29, 2015
So here's my take on this plenum spacers. You can definitely feel and hear the difference. Much more responsive. Expect to be surprised when you punch it after installation. And your car will growl after as well. I was really pleased. Except in the instructions it says to use some of your old bolt for hole #8 #9 #14 and #15. Which did not reach at all way too short. That resulted in a horrible vacuum leak and horrible idle problems. So I had to improvise. Order a plenum spacer fastener kit, same issue and ended up usining some of the longer bolts that came with this kit te replace those and problem fixed. And I see the TRUE potential and I love it. I suggest you get a buddy to help its hard hold up the plenum and align the spacer and 2 gaskets correctly.
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Alan
January 29, 2015
Unlike the fitment problem I had with the bolt on wheel spacers, the plenum spacer install went smoothly and the fitment was perfect. Took about an hour to remove and reinstall, and the another half hour to install the pop charger. That went smooth as well, everything fit according to plan.
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Diego
December 4, 2014
Purchases this item Friday, just got it today. Installed it, A's I live it!! Real easy to install, did it by myself. Noticeable increase in power, and has a great sound under WOT!!! A must get!
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Kelly
May 30, 2014
Quick,Easy,Nice price, perfect starting point to increase power!
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Gabe
October 12, 2012
Awesome great engine upgrade a must own! For the price and getting almost 10+hp for it you can't beat it! Great service from my boys Jon and Chuck also the packing peeps who deliver with the quickness!
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Gabe
September 29, 2012
Awesome service and results! This has to be the best 10+hp mod under $200 you can own a must have!
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Dajanaye
December 22, 2011
Love it! Simple to install and definitely makes a difference in performance :)
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Ryan
November 3, 2010
The Z1 plenum spacer is a great addition to any Z. Very easy install and can be completed with basic hand tools (sockets, and ratchet ect.). My tip would be to remember to adjust the legnth of the stock strut tower brace prior to re-installation. Even with using the supplied spacers the bar needs slight adjustment for engine clearence. End result is a slightly deeper more agressive exhaust note. My 05' touring AT felt quicker when accelerating past 3k rpm's. Great product, easy install, would definitly buy again!
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Ryan
November 3, 2010
The Z1 plenum spacer is a great addition for anyone looking to do a quick simple modification to thier Z. Installation was easy and straight forward, able to complete with basic hand tools (ratchet and sockets ect). Most difficult part is re-installing the stock strut tower brace. My tip would be to remember to adjust the legnth of the strut bar prior to re-installing, you\'ll need to adjust for engine clearence even with addition of the supplied spacers. The end result is a stealthy mod that sounds slightly more deep and agressive. Used on my 05\' touring auto - feels more responsive and will definitly notice quicker acceleration past 3k rpm\'s. Great product and a great price! Would definitly buy again.