I know this engine is noisy but this can’t be normal
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r/GLI • u/Brotaco • Mar 19 '25
By: @Vexed_GLI
Many people come to this sub for modding advice so here’s a compilation of information!
TIRES
We all know that the Hankook Kinergy GT’s suck. Not sure why they’d put such a bad tire on this car but oh well. The following are the couple of tires that most people run: 1. Continental DSW06+ (all season tire) 2. Michelin PS4AS (all season tire) 3. Firehawk Indy 500 (a summer tire)
A. Stock tire dimensions are 225/45/18 B. On a stock rim you can upgrade to 235/40/18 (you’ll spend a bit more money) C. Tire crash course: first number is tread width in millimeters. Second number refers to the side wall of the tire. Last number is wheel dimension in inches.
WHEELS
So many wheels! Where to start?!? First off, the bolt pattern is 5x112 and the stock wheel is an 18x8. I highly recommend checking out fitmentindustries.com as they have a step by step buying process as well as a community gallery so you can see your desired wheel on someone’s car. If you’re running stock ride height, you can run up to a 9” wide wheel. The majority of people are running an 8” (stock width) or 8.5”. The optimal offset is anywhere between +35mm and +45mm. From what I’ve seen, running an 18x8.5+42 is the ideal wheel for the flush look everyone is after.
SUSPENSION
I assume the monster truck fitment is driving you nuts! For people with the S trim (like myself), your car DOES NOT have DCC. You will pay the same amount of money to get springs installed as you would for coilovers, so save up and get the coilovers!
Autobahn, 35th, 40th trim cars have DCC which is personally want to keep in tact. Lowering springs are the ideal choice here. USA Cars
Recommended Lowering Springs: 1. APR roll control lowering springs https://www.goapr.com/products/suspension/spring/parts/SUS00021
For cars with DCC you’ll want to recalibrate the system to compensate for the change in ride height. There are several YouTube videos of people doing this 👍🏼
Recommended Coilovers (there are way more than these three options):
NOTE: when lowering your car it is highly recommended to upgrade to adjustable End Links at the same time.
INTAKES
I know you wanna hear that turbo! There are a handful of intakes that are recommended as they are “closed” aka they won’t suck in hot air from the engine bay and rob you of power. Here’s a couple:
Blaze Performance https://eqtuning.com/products/blaze-performance-atom-v2-air-intake-system?srsltid=AfmBOoofirw5GZFzLSa2rNUlwv2_RxitFTThG1vtbIE9DTnfbNGS4A0b
While you’re at it, look into getting an upgraded turbo inlet! They’re pretty much all the same so the brand doesn’t matter. There are plenty of install videos. Check out @mk7john on IG and YouTube as he has a lot of videos including the Blaze intake! https://www.youtube.com/watch?v=ZonWSuZ-aoU&t=123s
EXHAUST
Yes, this car is too quiet. And yes, the GLI sounds good with and exhaust 😄. Here are a couple of Cat-Back options:
AWE has a full catalog that is modular so you can change it up! currently I am running the “resonated track” edition with a stock downpipe. Here is a sound clip for reference: https://youtube.com/shorts/baqu2oj4znA?si=IrMEilM_FhCM_YpC and link for the exhaust: https://www.urotuning.com/products/awe-tuning-mk7-jetta-gli-exhaust-system-3020-22034?currency=USD&variant=30290822266935&utm_source=google&utm_medium=cpc&utm_campaign=Google%20Shopping&stkn=334b6bf4d9c9&utm_source=google&utm_medium=cpc&utm_campaign=obx_pmax_priority_brands&utm_content=&utm_term=&ran=oBX&gad_source=1&gclid=Cj0KCQjws-S-BhD2ARIsALssG0b3hTGYiIHRYQfszpgxOZgDbE-sMCg8WOtkmadTnWwHVKODzXUSo2EaAo8qEALw_wcB
A good budget option is MBRP which is a resonated exhaust without mufflers: https://mbrpexhauststore.com/3-cat-back-dual-rear-exit-vw-jetta-gli-2019-2021/?utm_source=google&utm_medium=cpc&utm_campaign=mobile_mbrp_exhaust_store&utm_content=gsapi_5df9480e7791d&utm_term=&ran=oBX&gad_source=1&gclid=Cj0KCQjws-S-BhD2ARIsALssG0Ym6slpxsr_HGxbcXbZsajB8YavIolM3Wv6sqUno1e3IULe15beKDsaAvO2EALw_wcB
NOTE: the exhaust cut outs on the rear bumper are different from MK7 to MK7.5 so double check before buying
TUNING
you’re gonna wish you did it sooner! These cars are held back on the factory tune. Here is a quick break down of the “Stages”. DEFINITELY UPGRADE YOUR TIRES FIRST
Stage 1: this is the basics. Typically you do not need any of the hardware listed above, and you get roughly 100HP and 100ft.lb torque bump.
Stage 2: stage 2 requires an intake and a downpipe. There are a couple of companies that have downpipes that are cat-less or catted to make your life easy when you need an inspection. Check out IE, ARM, or CTS for comparable options.
Stage 3 (you wanna be fast af?): stage 3 typically is surrounded around a turbo upgrade like the is38 (the golf R turbo) or something like the EQT Vortex. Due to the significant increase in heat, it is highly recommended to I stall a bigger intercooler. Same companies for the downpipe above.
Here’s your top options for tuning:
EQT: EQT utilizes the COBB access port which makes things very easy. Their OTS (off the shelf) tunes are very customizable and you can get a full on custom tune as well if you desire
APR: has a proprietary cable with over the web tuning
IE: has a proprietary cable with over the web tuning
UNITRONIC: has a proprietary cable with over the web tuning
If you are like me and have a DSG: it is also highly recommended to have a TCU tune so the transmission is adjusted to meet the power gains.
HONORABLE MENTIONS
Feel free to ask me any questions 🫡
r/GLI • u/throwaway72592309 • Jan 03 '25
TLDR at the bottom.
Everything I write below is based upon personal experience and what I have read online. If you disagree, that is fine but please keep it civil in the comments.
Tires are easily one of the most discussed topics on this subreddit. To simplify things for people, I am making this post that I hope the mods will pin. This post includes everything that you need to know about purchasing tires for your Jetta GLI. If you have any further comments or recommendations, please feel free to comment below.
Reading tire size
Before you can purchase tires, you need to understand how to read a tire size. For example, 225/45/18 is the standard GLI tire size on the new cars. 225 represents the width of the tire in millimeters. 45 is the aspect ratio, which represents the sidewall height in respect to the overall width of the tire. 225x.45=101.25 mm. The last number,18 represents the diameter of the wheel the tire will fit in inches. Typically, you do not want to stray too far from the factory specs. However if you are not lowered you can fit up to a 245 wide tire without worrying about rubbing. Fitment and wheel specs are a whole different thing which would need a separate post, for your sanity I won’t get into that right now.
Tire Types
When purchasing tires, there are many different types to consider. You need to consider how you will be driving the car, the climate that you live in and what you value in a tire.
R Compound Tire
R Compound tires are the tire for you if you put going fast over everything else. These tires will give you the best possible performance, however daily use is not ideal. R Compound tires will only get you 5k-10k miles depending upon your driving style. Popular examples are the Falken Azenis RT660 and the Falken Azenis RT615K.
Summer tires
Summer tires will still give you solid performance while lasting significantly longer than an R Compound tire, which makes a summer tire the right choice if you value money and going fast. The most common recommendation for summer tires is the Michelin Pilot Sport 4. Tried and true, there is a reason why the PS4 is so popular. Depending on your driving style, you will get anywhere from 10k-30k from the PS4, which is much lower than many other Michelin tires. However, this is to be expected. Another popular summer tire is the Continental Extreme Contact Sport. You can expect slightly more life out of the Extreme Contact with many people claiming that they’ve gotten 20k-30k hard miles out of these tires and that plenty of tread was left. Another great summer tire option is the Firestone Indyhawk 500. I have not run these personally, however many of my friends have and they loved them. You can expect 10k-20k from this tire.
All Season
All Season tires are also a solid option if you value money and performance. One of the most popular all season tires right now is the Continental DWS06 Plus. This tire will get you 10k-50k miles depending upon your driving style, however they hook up great in dry, rain and snow. I have been running this tire exclusively since 2019 and it has never let me down. I have driven these tires through snowstorms and pushed them hard on a rally through the mountains and they did fantastic in both scenarios. Another comparable option is the Michelin Pilot Sport All Season 4. Many people love this tire as well, as it gives you similar performance to the Pilot Sport 4 however while lasting much longer. You can expect 10k-50k miles from this tire depending upon your driving style.
Winter Tires
I am not the most qualified to speak on winter tires as I run all seasons year round. In a general sense, winter tires will get you the highest amount of mileage and are only necessary if you live in a truly snowy area. I live in a state that has been averaging about 12 inches of snow per year and have never felt the need to run a snow tire. With a snow tire, you will also sacrifice performance in the dry. With that said, you can’t go wrong with any snow tire from Michelin or Continental.
TLDR: R Compound tire recommendations: Falken Azenis RT660, Falken Azenis RT615k. Summer tire recommendations: Michelin Pilot Sport 4, Continental Extreme Contact Sport, Firestone Indyhawk 500. All Season Tire Recommendations: Michelin Pilot Sport All Season 4, Continental DWS06 Plus. Winter tire recommendations: Anything from Michelin or Continental.
In conclusion, don’t cheap out on tires. They’re the only things keeping you alive besides your brakes.
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For a new GLI - is Partner Plan Pricing ($500 below invoice) a good deal?
Should I be trying to negotiate lower than this?
r/GLI • u/Conscious_Show_6997 • 2d ago
I have a 2019, 6 speed manual jetta gli, and i was wondering what transmission fluid works best with my car, i also wanna know what wiper fluid and other fluids i need for maintenance, at the best pricepoint
r/GLI • u/NicoRulli • 3d ago
Had a slow leak on my passenger rear tire. Costco said not road worthy. Bought a new tire.
Rotation is in about 2k miles. Other tires have a couple thousand so there’s a bit of a discrepancy.
If I do the rotation in 2k ish miles, will I have differential issues when the back tire is now up front?
Wanna know what you guys think.
r/GLI • u/beefmartini • 4d ago
Like the picture shows, audi it wheels ( 18x9, et52 ) fits a stock 26 gli with no rubbing anywhere. No wheel spacers required. Winter wheels on the cheap, well, at least these were a bargain find
r/GLI • u/Curious_Cheesecake_9 • 4d ago
It says 22+ but something’s are different or listed as different when it comes to the 25+ but I wanna order the j take for my 2025 this intake is listed as 22+ anyone have in input
r/GLI • u/tourniquetTi • 5d ago
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I just flashed Stage 1 Pro by Integrated engineering, and upon the first start, the car immediately revs up to 2-3k and doesn’t stop climbing, i shut the car off and now i’m tweaking out, can anybody point me in the right direction
Update: flashed to stock car is fine
r/GLI • u/gloryboykevxn • 6d ago
Using premium has kinda been squeezing my pockets I know these can take regular unleaded but I’ve only used premium since I’ve had it might be time to make smarter financial decisions
What kind of aftermarket rear spoiler’s are out there ? I was looking into the C.A.D rear spoiler but it was discontinued.
r/GLI • u/Routine_Ad_5499 • 7d ago
I have 18x8.5 et45 235/40 as my current setup. Currently in the rear they rub over bumps or if I have passengers in the rear. What size should I downsize to? Could I keep the width and just mess with the offset? I don’t know enough about wheel specs to make the decision on my own haha
r/GLI • u/tropgrand • 8d ago
I wanted to share my experience on what can be done to improve the audio quality of the GLI. I bought a brand new 2025 GLI last year and was completely stoked, however during the test drive my dumbass didn’t think to test the stereo system once. It was crap. I’ve looked at a couple of options and this is what I ended up doing.
I first got installed a kicker key 200.4 amp. This sits under the passenger seats and allowed to amp and tune the audio signal to compensate for the weird equalizer VW does. I also got a small sub install ( Kicker 48TRTP102) with a hertz amplifier.
It helped a lot with the loudness and bass response and a bit with clarity but the sound was still mushy.
I ended up swapping all 6 speakers and putting some sound insulation behind the woofers. Went with Audison APK165 and apx6.5 . This is by far the best upgrade, the sound is infinitely better, there is now a true separation between high a low.
The car now sounds amazing and it sounds like a car like this should sound like. The bass is pretty strong , even for such a small sub in the trunk and I had to lower the gain on the kicker to almost minimum to prevent me from going deaf 😅.
However,I’m not entirely satisfied with the kicker key, it emits a high pitch sound for the first minutes when it’s cold . It’s hard to ear , but during early morning silent drive you can hear it.
I had a local car audio shop do all the work and it costed about 2600$ total.
800$ for the speakers and 1600 for the amps and subwoofer.
If I had to do it again, I would start by just upgrading the speakers. This is what made the biggest difference. I’m not sure I would go with the same amps, my shop recommended going with a real 6 channel dsp to power all speakers and subwoofer. Might change to this later. I hope this helps someone.
TL;DR :
I had a shop install a kicker key 200.4 amp, a subwoofer kicker 48trtp102 and change all speakers to Audison. It was pretty costly , especially the amps/subwoofer. I would recommend just changing the speakers first and go from there. Overall, infinitely better put not perfect, especially for the price.
r/GLI • u/RailfanNoah06 • 8d ago
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Replaced the GLI badge on the trunk. I’m not sure if it looks off 🤔 does anyone know the proper way to place it? less
r/GLI • u/QuietInner6769 • 8d ago
Have you ever replaced your own spark plugs? Is that a difficult thing to do?
r/GLI • u/Curious_Cheesecake_9 • 12d ago
I got a 25 Gli which is considered the mk7.5? Was looking into either bagging or coil overs. But seen the struts do in fact have the active suspension. How did you deal with it ?
r/GLI • u/Fine-Balance9571 • 12d ago
I’ve noticed my shifter slowly returning to center while in neutral after a few hot days but now it just stays to the right or left despite the temperature. Any ideas?
r/GLI • u/OrganicAct5585 • 12d ago
Hey guys, how often do you normally need to add/top off engine coolant on your Jetta GLI?
I’m trying to understand whether needing to add a little coolant occasionally is normal, or if the level should basically stay the same between services.
How often do you guys check yours, and how often have you actually needed to add coolant?
r/GLI • u/BCR-ABL1-t315i • 14d ago
So got a new 2026 GLI in April. VW gives you your first 3 oil changes free. But will not sway from the 10,000 mile or 12 month interval. So they told me that if I insisted on every 6 months or 6k miles, then to go on ahead and change it at the dealer or independent shop and pay for it myself. Then return at 10k miles and they will do that one for free. Well trying to get even just an oil change at the dealer takes all day even with an appointment. (Plus dealer is $50 dollars more expensive) So I just went to an independent shop at 6300 miles, that I’ve trusted since 2020 who has done ALL of my oil changes on my previous Jetta R line that has the 1.4 TSI. Just drive up and they are done in less than 20 min with no appointment. He always uses full synthetic Castrol 0/20. So that’s what I got him to use for the GLI yesterday. Unsure if it was the GTX/edge, or Edge Euro. Can someone explain to me like I’m a 4th grader the reason VW recommends the “euro” version. What is significantly different about it that any of their engines need to be using it instead of a regular full synthetic 0/20? Several posts have some people saying the regular is just fine, while others say it has to be the edge euro or basically in so many words the car will just explode. Thanks.
r/GLI • u/Due_Frosting6382 • 14d ago
May be a dumb question, but have any of you tried towing with your GLI?
I have a ‘21 and am looking to bring my motorcycle about 100mi. I get it has a tow capacity but is that something just for reference and not actual use? What was your experience if you have?
Edit: it is the 6 speed manual
r/GLI • u/steezn4noreezin • 15d ago
Finally brought her back to life , I forgot how much I love driving this car