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Discussion Starter · #1 · (Edited)
I would like to share how to do a big brake upgrade using Hyundai OEM parts.

I found the brakes too awful on the 2nd gen Forte so I looked into this and found this mod on Korean sites..

Lot of auto mechanic shops in Korea do this mod on the forte or K3.
They call this "National Brake", it is done very common.
And cost effective, you don't need to spend tons of money getting brembos or 4 piston caliper brakes to increase braking capability.
I did it and results are excellent.

I even read on some posts on this Forte forums some people claiming it's useless to have big brakes for street application and I totally disagree.
I think the brakes that come with this car are lacking in performance and undersized. It is barely adequate.
With 4 adults this car doesn't stop well to the point where I found it dangerous.
Now after upgrading my brakes to this the car is easier to drive and even with 4 people I don't even feel the extra load when braking.

Also you will get lot of modded Civic drivers staring at your brakes. :)

Here it is before and after pictures.

Stock brakes on 17 inch wheel

83426


Stock puny brakes

83424


Bigger 2 piston caliper

83425


Comparing disc size before install

83427


After install

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After install. With wheels... Notice the clearance on the 17 inch wheel.

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After break in procedure ( and after 4k miles )


20210725_145527.jpg


*** The vehicle pictured above is a 2017 Forte LX and is mod A.

Description and Part No's for each scenario.
PLEASE READ CAREFULLY.
===========================
I have listed comprehensive XG2P brake mods for the front for all 3 generations of Forte keeping 17", 16" wheels.
I have personally done mod A so I can confirm mod A works.
*** The other mods I did not actually perform them personally so I am just giving you the information. Please use your judgement.

A. MOD FOR 2nd Generation YD (2014-2018) for 17"+ wheels, 320 mm (12.6") disc, 12 inch Hyundai XG 2 Piston calipers

AND

B. MOD FOR 3rd Generation BD (2019-2021) for 17"+ wheels, 320 mm (12.6") disc, 12 inch Hyundai XG 2 Piston calipers


[ SAME PARTS FOR A, B ]​

  1. Front Calipers (2 Piston)

    need calipers off 2005 Hyundai XG350 (need the bigger 12" front calipers, the earlier models of XG350 had 11")
    Hyundai Part No.
    58180-39A30 (Left) (click to see)
    58190-39A30 (Right) (click to see)

    Mando is the OEM brake manufacturer for Hyundai / Kia.
    Hyundai caliper will cost ~$260 per caliper.

    If you were on a budget you can forgo getting the part from Hyundai and buy a
    Mando caliper. It's the same caliper without the Hyundai packaging.

    Search for these google it / ebay it
    (I saw them in the $50-$80 ranges)
    MANDO 16A5164
    MANDO 16A5165



  2. Front Discs (320mm = 12.6")

    need discs i think from 2012 Hyundai Azera
    Koreans call this the GDI 320 mm disc....
    *** DO NOT USE the discs from XG350 they are smaller I think they are 300 mm~ (12").

    From my research I read that from 2006 Hyundai / Kia cars they increased the spacing on the knuckle to the caliper mount so you can use bigger size discs.
    This is why you can put a 320 mm disc on a caliper originally designed for 12" (300 mm) disc.

    The XG350 12 inch discs (DO NOT GET THESE)

    You will need these below.
    Hyundai / Kia Part No. (They are the same part, just giving you reference for both Hyundai / Kia Part No.)
    51712-2T000 Hyundai (click link to see)
    51712-2T000 Kia (click link to see)

    You will need 2X discs.


    Note - These parts fit multiple cars not just the 2012 Azera.

    You can use the Hyundai / Kia discs, or aftermarket disc of your choice.
    I used EBC GD7645 - if you don't like brake noise try a different model,
    these make unique grinding / (rattle snake) noise on braking and just at cruising.
    I don't mind the noise, you can only hear them with windows down not when windows are closed.
    I think just the EBC GD series have this noise as I found the similar findings on posts on other websites.

    Good thing with EBC brakes they are 100% made in USA / UK. (cast / machined)
    It took me long time to filter out Chinese brakes.
    Lot of aftermarket brake companies claim their discs are made in USA but the discs are mostly casted in China but machined in US.
    I just emailed them and asked where their brakes were made.
    Please careful when choosing aftermarket discs.

  3. Front Brake Hose

    No need to replace.the stock brake hose fits the calipers, you need to mount it reversed from the stock brake calipers.
    you will see when you get to connecting it, it doesn't fit in the same orientation.
    *** You need to careful at this step not to damage the brake hose mount when mounting on the caliper.

  4. Front Brake Pads

    Find a brake pad of your choice - For 2005 XG350 Front applications.

    You can get aftermarket or stick with stock brake pads.

    Hyundai Part No.
    58101-39A60 (click link to see)
    58101-39A60 (just for reference -> different site - click link to see)
    I used PowerStop Z23-1013 pads

  5. Need DOT4 brake fluid and you need to know how to bleed the brake line after install.

    I used Valvoline DOT4 full synthetic brake fluid.

  6. Check clearance of the dust/splash guard. I had slight rubbing, i slightly bent it out of the way now no rubbing.
*** YOU WILL NEED 17" WHEELS MINIMUM TO CLEAR THE BIG CALIPERS / DISCS​
*** If you have 15 / 16 inch wheels DO NOT DO THIS MOD without preparing 17 inch wheel tires that fit.​
(from what I know they will clear all 17 inch wheels and up)​
*** So it will FIT the STOCK 17 inch wheels.​
83435
I didn't check if the spare tires fit yet.​
*** Reference Below
2nd gen YD (2014-2018)​
* 320mm disc, XG2P calipers (12"), 17" wheel and above​
================================​
THIS MOD IS CONFIRMED BY ME, so I know it works just bolt on swapping.​
3rd gen BD (2019-2021)​
* 320mm disc, XG2P calipers (12"), 17" wheel and above​
================================​
this mod should be also straight forward, its exactly same as 2nd gen.​



C. MOD FOR 1st Generation TD (2010-2013) for 17"+ wheels, 315~317 mm (12.5") disc, 12 inch Hyundai XG 2 Piston calipers

[ SAME PARTS AS MOD A, B (please look at the part no's) ]​
*** However you NEED to grind down the 51712-2T000
320 mm down to 12.5"​
NEED modification to the disc or the calipers.​
Some people think modifying the disc is better or some people think modifying the calipers is better​
b/c discs are something you have to keep replacing more often not the calipers.​
I would mod the disc, I am not sure what the implications on modding the caliper to fit, nor did find any SOLID information on it.​
If you use the 320 mm disc just as it is, disc will interfere / rub on the inner side of the caliper.​
You must machine the disc down.​
The reason why I have 3 sizes 315 / 316 / 317 mm is I am getting variation from different sites,​
if you don't have easy access to machining just straight go for 316 mm or 315 mm,​
if you have easy access / free machining service near you, I would try out 317 mm and see if it fits and not rub
then 316 mm then 315 mm and so on.​
Use your judgment, I have put the links below.
They all vary and use 315 mm, 316 mm, 317 mm.​
*** Reference Below
1st gen TD (2010-2013)​
* 315 / 316 / 317 mm disc, XG2P calipers (12"), 17" wheel and above​
================================​
This one below shows you exact part no's they used plus where it will rub if you install 320 mm without modification.​
This one below shows you machining the discs down to 317 mm.​
There is a video clip.​
The shop owner says even shaving down to 317 mm to clear the caliper from rubbing on the disc,​
this mod will let you use the pad area to the fullest, so you use the pad area 100% effectively.​


16" wheel + mods
(if you want to keep your 16" wheels do this mod. - REQUIRES MINIMUM OF 16" wheels)

================================

D. MOD FOR 1st Generation TD (2010-2013) for 16"+ wheels, 300 mm (12") disc, 11 inch Hyundai XG 2 Piston calipers
  1. Need 11" 2 piston calipers from earlier year models of Hyundai XG.
    The Korean sites still call this X2GP mod, so there is some confusion.

    They don't specify the size most of the time and call both mods XG2P mod.

    11 inch 2 piston caliper
    Hyundai Part No.
    58180-39A00
    58190-39A00

    These are the mando part numbers.
    These are cheaper.
    Like I said before they are the OEM maker for Hyundai / Kia brakes.
    MANDO 16A5162
    MANDO 16A5163




    *** You can tell 11" caliper from the 12" caliper, 11" has more curb on the caliper near the center. the 12" is straighter

  2. you will need a 300 mm disc

    (*** I am not 100% sure which part it is exactly b/c I searched endlessly and there was nothing on Korean sites about the part no. but its definitely 300 mm)
    I think it's the stock ones that came with SX trims.

    If your 1st gen came w/a 300 mm disc,
    I think you should try this mod with your stock 300 mm brake discs w/ the 11" XG 2P calipers.

    Reasons and Reference Below.
    • Because the height and thickness is exactly same as the 320 mm discs (used for the 17" wheel brake mod) which is 28 mm / 47.4 MM respectively.

      This is the spec for the 320 mm disc
      Height47.2mm
      Minimum thickness26.4mm
      Outer diameter320mm
      Thickness28mm

      51712-2T000 320 mm disc specs (I looked up 2012 Hyundai Azera)

      This is the 300 mm / 12" ("16 inch brakes") disc specs.
      https://www.autozone.com/brakes-and...rotor/p/duralast-brake-rotor-31427/900959_0_0

    • And the center (inner diameter) is small enough to clear the 11" XG2P calipers.
      153.5 mm (1st gen Forte SX) vs 155.9 mm (2002 XG)


      83588


      83589


    • FOR REFERENCE: The 1st / 2nd gen Forte's had same rotors up front.

      Fronts came in
      1. 280 mm ("15 inch brakes") like my 2017 Forte LX
      2. 300 mm ("16 inch brakes") SX
      depending on the vehicle trim.

      ===============================
      "16 inch brake disc" (300 mm / 12") and applications.
      Part No. 51712-1M500


      MakeBody & TrimEngine & Transmission
      2018 Kia ForteEX, LX, S2.0L L4 - Gas
      2018 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2017 Kia ForteEX, LX, S2.0L L4 - Gas
      2017 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2016 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2016 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2016 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2015 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2015 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2015 Kia Forte5EX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2014 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2014 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2014 Kia Forte5EX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2013 Kia ForteEX, LX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2013 Kia Forte KoupEX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2012 Kia ForteEX, LX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2012 Kia Forte KoupEX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2011 Kia ForteEX, LX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2011 Kia Forte KoupEX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2010 Kia ForteEX, LX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      2010 Kia Forte KoupEX, SX2.0L L4 - Gas, 2.4L L4 - Gas
      ===============================
      "15 inch brake disc" (280 mm / 11") and applications.
      HERE FOR REFERENCE.
      Part No. 51712-A7000


      MakeBody & TrimEngine & Transmission
      2018 Kia ForteEX, LX, S2.0L L4 - Gas
      2018 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2017 Kia ForteEX, LX, S2.0L L4 - Gas
      2017 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2016 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2016 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2016 Kia Forte5EX, LX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2015 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2015 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2015 Kia Forte5EX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2014 Kia ForteEX, LX1.8L L4 - Gas, 2.0L L4 - Gas
      2014 Kia Forte KoupEX, SX1.6L L4 - Gas, 2.0L L4 - Gas
      2014 Kia Forte5EX, SX1.6L L4 - Gas, 2.0L L4 - Gas
===> So to summarize my advice is​

  • Get the smaller 11" XG2P calipers
  • Use the stock 300 mm discs that came w/ 1st gen Fortes on the SX.
    Part No. 51712-1M500
  • Get the brake pads for 11" XG2P calipers
    Part No. 58101-39A20
I see a blog specifying exactly 300mm and the 11" XG2P so I am confident it will work.​
*** Reference Below
Looking at the picture, it looks like the SX discs, there is a gap ring around the inner diameter of the disc​

E. MOD FOR 2nd Generation YD (2014-2018) for 16"+ wheels, 300 mm (12") disc, 11 inch Hyundai XG 2 Piston calipers
I didn't see one post or search result on this on Korean sites.​
It looks like everyone there is going for the 17" wheel brake mod.​
*** If you want to keep 16" wheel and just upgrade the calipers, I think it will be the same as the 1st gen. Since they use the same parts.​
===> If you were to do this mod, my advice is​
  • Get the smaller 11" XG2P calipers
  • Use the stock 300 mm discs that came w/ 2nd gen Fortes on the SX?
    Part No. 51712-1M500
  • Get the brake pads for 11" XG2P calipers
    Part No. 58101-39A20
**** Remember I didn't find one example of this mod, you are on your own on this one.​


F. MOD FOR 3rd Generation BD (2019-2021) for 16"+ wheels, 305 mm (12") disc, 11 inch Hyundai XG 2 Piston calipers

The 3rd gen front discs also came in 2 sizes depending on trim.​
(11" brake disc)​

Make​
Body & Trim​
Engine & Transmission​
2020 Kia Forte​
EX, FE, GT-Line, LXS​
2.0L L4 - Gas​
2019 Kia Forte​
EX, FE, LX, LXS, S​
2.0L L4 - Gas​
(12" brake disc) I think these are 305 mm not 300 mm (need confirmation)​

Make​
Body & Trim​
Engine & Transmission​
2020 Kia Forte​
GT​
1.6L L4 - Gas​
THERE IS NOT ENOUGH INFO ON THE 3rd gen for 16" brake mod.​
SO I DON'T HAVE ANY INFORMATION FOR YOU TO DO THIS ONE.​
Also the rotors I think I read somewhere that it's 305 mm so I can't recommend to try this out
===> I don't know if the calipers won't rub on them.​


G. MOD FOR 15" wheels
I WILL NOT DO A 15" mod b/c I don't think there is one.... except upgrading to aftermarket performance rotors / pads.​
Even that will improve it but not to the point of upgrading to 2 piston and enlarging the disc size.​



I have seen other vehicles w/ the same XG2P mod. Here is an example.
===================================

*** Reference Below


There is also another mod I am seeing it has to do with using a larger 1 piston caliper that is also Hyundai OEM but it's not that popular.




REAR BRAKES ARE ALL 262 mm in diameter.
==================================

1st gen uses part no.​
262 mm outer diameter​
182 mm inner diameter​
64.6 mm height​
10.0 mm thickness​
2nd gen / 3rd gen uses part no.​
262 mm diameter​
167 mm inner diameter​
45.1 mm height​
10.0 mm thickness​
Same outer diameter but different in spec.​
I don't have much suggestion for the rear but to upgrade it to a more performant disc / pads.​
Note: EBC do not make discs for the 2nd 3rd gen. Not sure about 1st gen.​

THIS POST WAS ORIGINALLY INTENDED for the 2nd gen 17" wheel brake mod but it looked like other members wanted info on 1st and 3rd gen as well along with brake mods for keeping 15" and 16" wheel so I am posting what info I could find here.

Good luck.
 

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That's an old mod people did to 2003-08 GK Tiburons. (I used to have a 2004 GT)

 

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Discussion Starter · #6 · (Edited)
That's an old mod people did to 2003-08 GK Tiburons. (I used to have a 2004 GT)

.....
Interesting, you are right. This mod I think has been around.
LOL, it looks like these people are using this mod in different forms of variation.

==========================================================================

Dang, can this big brake mod be done to 1st gen Fortes?
It works on 1st gen, however you have to use 315 mm / 316 mm discs (12.5") not 320 mm,
You can't just use the 320 mm it won't fit, according to the blog post below,
the mechanic of the shop says you have to use 315 mm *** in the case of the 1st gen Forte.

Depending on the shop its slightly different but it is 316 mm or 315 mm that you need.

It looks like these shops are machining the discs down to that size from 320mm.
They are indeed machining it => you have to shave off about 2 mm off the edge of the discs before installing.

For reference the original XG350 i think are (300 mm = 12")

BELOW: It says you can't just use the 320 mm as it is, you need it as 316 mm

83512


1st gen Forte


1st gen Forte Koup

It works also on Forte Koup but they are also using the 315mm disc (12.5").

 

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Discussion Starter · #7 · (Edited)
That's an old mod people did to 2003-08 GK Tiburons. (I used to have a 2004 GT)

.....
I was looking thru those posts on Tiburon, looks like people were paying 260ish for each caliper... So thinking about that...

Mando is the OEM brake manufacturer for Hyundai.



Search for these (I even saw them cheaper in the $50 ranges)
MANDO 16A5164
MANDO 16A5165

If you were on a budget you can forgo getting the part from Hyundai and buy a
Mando caliper. It's the same caliper without the Hyundai packaging.

I didn't shop for it else where but on ebay its going for ~80 bucks per side.
I just looked it up to get an estimate.

So
~$160 for both calipers
~$160 for discs


And I think pads are like $60
Fluid is about another $20

The total comes out at about slight above $400

For under $500, this mod can be done.
 

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This sounds a lot like what Hyundai did with the Veloster N to keep costs down. Instead of sourcing fancy and expensive Brembo brakes, they went to their parts bin and used brake hardware from their SUVs.
 

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Any mod like that for those of us with 15" wheels? I don't think those larger discs and calipers would fit my wheels. Whaddya think? Brakes are what keeps us and everyone else safe, so I'm all for upgrades!
 

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Any mod like that for those of us with 15" wheels? I don't think those larger discs and calipers would fit my wheels. Whaddya think? Brakes are what keeps us and everyone else safe, so I'm all for upgrades!
For the 15s it doesn’t look like you can really fit bigger brakes. In that case, it’s probably best to get more aggressive pads
 

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Discussion Starter · #11 ·
Any mod like that for those of us with 15" wheels? I don't think those larger discs and calipers would fit my wheels. Whaddya think? Brakes are what keeps us and everyone else safe, so I'm all for upgrades!
I thought about that as well, I have a 2017 Forte LX (total base) and it came w/ the 15" steel wheels,
however I decided to just upgrade the wheels / tires,
but if you wanted to keep the 15" for maybe fuel economy and other reasons,

I think you have to keep the caliper but upgrade the discs / pads.
I did this on a car back 20 years ago on a 95 accord just upgrading to a performance rotor (it was either power stop or stop tech) / stock pads
and even that improved it.

The thing is the price of the aftermarket rotors for 320 mm size and whatever the stock ones are on Forte it wasn't much of a difference for me I did it
on basis of performance return on the money spent. And you can't get nice tires for 15" wheels. The nicer models just don't come in that size.

For the people who want to keep the 16" wheels, I've seen some mods on the Korean blogs / forums I think they used the 11 inch dual piston calipers from the XG350
but I have to confirm. I've seen this on the 1st gen. I am not sure which 300mm discs they are using.

 

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Well, I just upgraded my pads a couple of months ago. I replaced the rotors too both front and rear, but nothing fancy. I do now have ceramic pads both front and rear and it seems like my braking has improved a tad but that just may be my imagination. My pads didn't really NEED replacing yet, but I figured with over 100,000 miles on them and the dust on the front ones messing up my factory hub caps, I needed to do SOMETHING! The low dust from the ceramics is barely noticeable.
 

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2010 Kia Forte Koup SX 2.4L 6MT Theta 2, Titanium silver metallic.
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My 2010 Koup SX 2.4L from the factory has its oem brake calipers, rotors, wheel hub bearings & suspension.

Suspension is fine. I need to change all 4 rotors. wheel hub bearings sound/feel fine, so far.

I would love to change all 4 brake calipers to non Autozone, O'Reilly's, advanced auto, Napa, Pepboys Chineseium pos made. Not sorry for my comment cause for almost 20yrs+ of my 50yrs being alive. I've dealt with their inferior made & quality on plenty of vehicles. Especially when it's the dealing with braking system.

Master cylinder, brake booster, calipers, rotors/bearings/hubs their sh*t never fit slide pins bolts, bolts/banjo bolts, bleeding screws, brake hoses/lines.
 

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Sorry for the rant.

My SX is at 90,000miles. The few times I've just checked the rotors/brakes & calipers. I need to replace with new ones.

The rotors need to be done. I'd like to either find an OEM/factory brake caliper repair kit (all 4 calipers still work but still) or buy non Chineseium made front & rear brake calipers.

This post immediately got my attention. It's been something I've been wanting to do for a long time. I'd use bigger or better Kia/Hyundai OEM/factory brake calipers & rotors if they fit a 2010 thru 2013 Kia Forte Koup SX 2.4L.
 

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Discussion Starter · #15 · (Edited)
Sorry for the rant.

My SX is at 90,000miles.
.....
This post immediately got my attention. It's been something I've been wanting to do for a long time. I'd use bigger or better Kia/Hyundai OEM/factory brake calipers & rotors if they fit a 2010 thru 2013 Kia Forte Koup SX 2.4L.
Do you have the stock wheels on your vehicle and it's 16 inch?

I think you can maybe upgrade to the Xg350 11 inch rotors and 300 mm discs. If you don't want to change the wheels.

For the price of mandos, I think you can just replace the calipers. It probably cheaper than the repair kits and you would be getting new 2 piston calipers.

This is for 16 inch wheel applications for Forte Koup
================
11 inch 2 piston caliper
Hyundai Part No.
5818039A00
5819039A00

MANDO 16A5162
MANDO 16A5163


About $60-$70



I will get back to you with 300mm disc part no.
 

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I still have & own the OEM/factory wheels. They're 17inch. That's what stamped on the oem wheels.
83554

83555




My friend wanted another style so he bought some MBs from Discount Tires.
83556
83557
 

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83558
83560


2010 thru 2013 SX front & rear rotors. I typed in all 4 yrs into Autozone & O'Reilly's system. The numbers/measurements all match. Fronts are 300mm & rears 262mm.
 

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Discussion Starter · #20 ·
I have updated the ORIGINAL post. I hope it helps.

This post was ORIGINALLY just intended for 2nd gen... since I can confirm the mod.
 
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