2004 STi 5x100 to 5x114.3 Hub Conversion Info Inside

[Gixhost]

Current Setup:

2004 WRX STI

Suspension:
2005 STI hub conversion
2005 STI aluminum rear lateral links
RCE Black springs
Whiteline 24mm front and rear sway bars
Whiteline lateral locks front and rear
MOOG front endlinks
Cusco rear endlinks

Engine:
IAG top feed conversion kit
ID1050X injectors
Aeromotive A1000-6 FPR
Aeromotive 340 LPH fuel pump
Crawford AOS
Perrin turbo inlet
Perrin afta-maf hose
Killer B Motorsport dual oil aender adapter
TurboXS tune/Cobb AP V3

Cooling:
Koyo aluminum racing radiator [KOYVH091672]

Exhaust:
Killer B Motorsport 4-1 Holy header SwainTech coated w/V-band
COBB GESI catted DP
COBB Titanium cat-back exhaust

Turbo:
IHI VF48HF

Transmission:
ACT SB10-HDSS
Perrin pitch stop mount

Exterior:
GR Gold STi BBS (summer) Dunlop Sport Maxx RT
GR Silver STi BBS (winter) Bridgestone Blizzak WS80
2005 STi badges
JDM Subaru rain guards
JDM STi front under spoiler

Interior:
SMY ClusterMaker dual gauge pod 52mm
Defi CR boost gauge
Defi CR oil pressure gauge
TWM Phantom shift knob
2005 STi steering wheel/airbag
2007 STi Limited red hazard button
2006+ STi floor mats
2005+ Sun visors
ProSport aluminum dead pedal

Sound:
Kenwood KDC-X997
Kenwood XR400-4


FYI: This thread does not provide technical information to perform the swap yourself. This is just a list of the parts that you will need. I attempted to make this as detailed and accurate as possible. Many parts are needed and the designs have changed over the years. Check, check and triple check before spending your hard earned cash as your needs may be different than mine. Some points on how your experience may be different from mine is mentioned after the parts list.

I am making this post because finding all the information to perform the 5x100 to 5x114.3 swap wasn't easy. I wanted to source factory parts because the custom options may not always be available. I have nothing against the modified knuckle and tone ring options out there. I wanted a full conversion to 05-07 STi equipment. I primarily wanted to retain the ease of sourcing replacement OEM parts. You can definitely save some cash going with some of the alternative solutions.

I have gathered as much information on this as I could find from various sources. I still ended up finding more parts at the last second. I collected all of the parts for this swap over about a years time, maybe a little longer. I have tried my best to compile a list of parts you'll need as well as part numbers. I am only making this post so that anyone who attempts this in the future may have an easier time and only have to rely on a single source for most information related to the swap.

I hope someone finds this information useful. Thanks to all the people who provided information on NASIOC and IWSTI in various threads. And thanks to Andrewtech Automotive for performing the actual conversion. These guys are the truth, 100% professional and just down right good people to hang out with.

(Again, even after reading this, check the part numbers, many of the larger parts I sourced used, but I still tried to compile a list of part numbers for my records. I am fairly certain these are all correct but I can't stress it enough, double check before spending your money. All of the years listed with STi 05+ etc. are concerning the GD sedan only, unless otherwise noted.)


My Vehicle:

2004 STi (Female Front Axles: MFD of 04/03)

Parts Installed on Car:

05 STi - TIE BAR x 2 26261FE000
05 STi - BOLT AY M12X54 x 4 901120131
05 STi - COVER F DISK BRAKE RH (Dust Shield) x 1 26290FE020
05 STi - COVER F DISK BRAKE LH (Dust Shield) x 1 26290FE030
05+ STi - RET-DIFF SIDE (AKA Sundials) x 1 38342AA130
05+ STi - RET-DIFF SIDE (AKA Sundials) x 1 38342AA161
05+ STi - OIL SEAL-35X50X9 x 1 806735290
05+ STi - OIL SEAL-35X50X9 x 1 806735300
05+ STi - O Ring-84. 1x1. 95 x 1 806984040
05+ STi - O RING-115. 5X1. 9 x 1 806900150
06-07 STi - HOUSING RH (Right Front Knuckle) x 1 28313FE061 (05 STi Old Part# 28313FE060)
06-07 STi - HOUSING F AXLE LH (Left Front Knuckle) x 1 28313FE071 (05 STi Old Part# 28313FE070)
05+ STi - REAR HOUSING AY RH (Right Rear Knuckle) x 1 28411FA000
05+ STi - REAR HOUSING AY LH (Left Rear Knuckle) x 1 28411FA010
05+STi - HUB CP RR STI (Rear Hub) x 2 28462FE011
05+ STi - ROLLER BRG x 2 28016PA010
05+ STi - OIL SEAL x 2 28015AA080
05+ STi - OIL SEAL x 2 28015AA070
05+ STi - HUB CP F AXLE (Front Wheel Bearing/Hub) x 2 28373FG010
05+ STi - Front Axles x 2 28321FE192
06 STi - Rear Lateral Links (LATERAL LINK AY F) 20250FE200 x 2
06 STi - Rear Lateral Links (LATERAL LINK AY REAR) 20250FE360 x 2
05 STi - Spare Wheel/tire 5x114.3 x 1
10 STI - BBS w/Potenza RE760 x 1 set
07 STi - Struts and springs x 1 set
04+ STi - RCE Regular Guy Springs x 1 set
05+ STi - AC Delco Professional DuraStop Rotors x 1 set
04+ STi - Hawk HPS Brake Pads x 1 set


Other considerations:

1. Sundials and Seals: Early 2004 STi models had female front axles. If you have a late 04 STi with male front axles, from the research I've done, you don't need the following parts, they should already be in your transmission.

05+ STi - RET-DIFF SIDE (AKA Sundials) x 1 38342AA130
05+ STi - RET-DIFF SIDE (AKA Sundials) x 1 38342AA161
05+ STi - OIL SEAL-35X50X9 x 1 806735290
05+ STi - OIL SEAL-35X50X9 x 1 806735300
05+ STi - O Ring-84. 1x1. 95 x 1 806984040
05+ STi - O RING-115. 5X1. 9 x 1 806900150

2. Tie Bar and Bolts: If you are using 06-07 STi front knuckles you don't need the following parts. These parts were unique to the 05 STi only. The Tie Bars were later integrated into the 06+ STi knuckle and Subaru continued to use the short bolts that come with the 04 STI on the 06-07 STi models. 05 knuckles need longer bolts for the addition of the Tie Bar. Some will say you can skip out on the Tie Bars on the 05 STi knuckles entirely and just use your 04 bolts without the Tie Bar, again I wanted a factory correct build.

05 STi - TIE BAR x 2 26261FE000
05 STi - BOLT AY M12X54 x 4 901120131

3. Front Dust Shields: 04 STi front dust shields absolutely do not fit 05 front knuckles, from what I could tell even 06-07 dust shields are different from 04 and 05 models. I have not seen them side by side but they appear to be different from pictures I've seen. Purchase what you need based on which year knuckles you are using.

4. 05+ STi aluminum rear lateral links: The 2006 STi lateral links I received, from what I could tell, are the exact same length as 2004 STi steel lateral links at their mounting points. The overall footprint is larger but not the mounting points. My concern was that I would need to replace my rear axles but that was not necessary.

Secondly, this was totally optional. You don't need to replace the rear lateral links. I wanted the additional rear track width over the 04 STi that most Subaru literature suggests the 05+ STi has, but I don't know where this comes from as they seem to be the same length. Everything I've read contradicts this with the exception of a post on a Forester forum in which that owner appeared to be under the same impression, the links aren't longer.

Unfortunately I don't have accurate measurements to back this up and the post on the Forester forum directly comparing the two versions of these lateral links had broken image links.

5. Rear Knuckles: You don't need to replace your rear knuckles, you just need the new 05-07 STi 5x114.3 hub and bearings to be pressed into your current rear knuckles, however, more often than not I found the front and rear knuckles being sold as a set used. This is the route I went with, buying a set. I must warn you though, as much good experience as I've had with purchases and sales on NASIOC, this was a bad one.

The seller of the items did not pack these correctly causing the front and rear dust shields to be badly mangled, mainly the rear, and when contacted about it, they suggested I simply bend them back blaming UPS. After buying/selling many things over the years I know when someone just threw something in a box carelessly, not taking any amount of time to properly package an item or use the proper packaging material.

The front weren't too bad but I just replaced them, the rears were the worst (of course they are harder to replace than the front.) and I did end up bending them back as the cost to have them disassembled and replaced after what I already spent for the set just wasn't worth it. After getting them as straight as I could, I sanded them and put a nice coat of semi-gloss black on them since they had chipped a lot as well during shipping. Long story short, I don't know if I would buy these and have them shipped again, just a warning to all those purchasing used, already assembled, rear knuckles.

6. Struts: Technically you do not need to replace your rear struts...just the front struts. The rear struts are the same as 05+ STi models except they are cherry blossom red on the 04 STI instead of black as on the 05+ STi. It is the front struts mounting point that changed to accommodate the new style 05+ STi knuckles. As mentioned above, you'll most likely find these being sold in sets...I just purchased a set. 05+ STi struts are a dime a dozen and usually cheaper than 04 STi struts from what I have seen. I assume this is because the 04 STi struts are compatible with the GD WRX models unlike the 05+ STi struts.


Well that's pretty much all I have to offer. If I remember anything else important or in the event I am contacted with suggestions/corrections, I will update the thread as necessary.

-Gixhost

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[murrdogg24]

thanks for all the info, i want to do this 5x114.3 swap soon and use this as reference material

[murrdogg24]

just curious if your method would be cheaper than this here:
http://www.licmotorsports.com/produc...ti_lic-0420041

[Gixhost]

Its mentioned in the info above but I didn't want to name any products. The kit is going to be cheaper in terms of cost of parts, that is, unless you can source OEM parts dirt cheap. I hope this helps you.

[Dirtracr95]

I've been thinking of converting my bugeye to 5x114.3 for wheel selection. I think there's easier/cheaper ways to achieve this. I'm looking into removing the studs plug welding the holes and redrilling to 5x114.3. Plug welding might not even be necessary.

[hybrid gti 2]

What about the old 6gun kit? As I have one and I am getting ready to install it.

[Gixhost]

Yes, I am sure through ingenuity and skill you can achieve a 5x114.3 wheel pattern on a WRX or 04 STi on the cheap. Spacers are even an option used by some successfully. However, the added benefits of the hub conversion aren't realized without using the improved front knuckles. Also custom parts will always need to be manufactured in the case of a part failure. As far as kits, the 6gun and LIC kits were both kits I was considering before deciding to go with all OEM parts as discussed in the main post.

[Dirtracr95]

What's improved in the front knuckles between your 04 and 05-07? I just reread the thread and didn't see it mentioned.

[JarHarms]

Originally Posted by Gixhost

6. Struts: Technically you do not need to replace your rear struts...just the front struts. The rear struts are the same as 05+ STi models except they are cherry blossom red on the 04s instead of black as on the 05+ STi. It is the front struts mounting point that changed to accommodate the new style 05+ STi knuckles. As mentioned above, you'll most likely find these being sold in sets...I just purchased a set. 05+ STi struts are a dime a dozen and usually cheaper than 04 STi struts which are more sought after since they are a nice OEM upgrade for the WRX guys and the 05+ struts are only compatible with STi models.

Good info. Worth mentioning: If one already had a 2004 STI (or WRX for that matter) with FEAL rebuilds. You can just swap out the front housings using the rebuilt inserts and they will bolt to the OEM 2005+ STI front knuckles. So what if the colors don't match.
**And thanks for noting the 5x114 spare wheel. It seems to me that this is often overlooked until the very time you need that to work.

Originally Posted by Dirtracr95

I've been thinking of converting my bugeye to 5x114.3 for wheel selection. I think there's easier/cheaper ways to achieve this. I'm looking into removing the studs plug welding the holes and redrilling to 5x114.3. Plug welding might not even be necessary.

You will only achieve the wheel lug pattern change (in order to run different bcd wheels) and not get the front hub unit wheel bearings. <see below> If that is all you want then I'd opt for quality conversion spacers over the effort doing what you mentioned. Plus not just anyone can redrill hub bcd correctly/safely, its nothing like redrilling brake rotors....

Originally Posted by Dirtracr95

What's improved in the front knuckles between your 04 and 05-07? I just reread the thread and didn't see it mentioned.

The front wheel bearing changed from the usual hub pressed into bearing and into the knuckle design used in 2004 STIs and most all WRXs. The 2005+ STI front wheel bearing is actually a hub unit that bolts to the knuckle. It's larger and more capable of sustaining severe use.
*The 08+ WRX bolt-in hub units is not as robust as the STI versions and a complete waste of time to convert to.

[Gixhost]

^^^Exactly^^^

I didn't explain what was improved because its all debatable as to whether its even worth upgrading depending on your situation and needs. I figured if you were interested in this conversion you most likely already did some research and have some knowledge. That was a bad assumption on my part.

[Dirtracr95]

Originally Posted by JarHarms

You will only achieve the wheel lug pattern change (in order to run different bcd wheels) and not get the front hub unit wheel bearings. <see below> If that is all you want then I'd opt for quality conversion spacers over the effort doing what you mentioned. Plus not just anyone can redrill hub bcd correctly/safely, its nothing like redrilling brake rotors....


The front wheel bearing changed from the usual hub pressed into bearing and into the knuckle design used in 2004 STIs and most all WRXs. The 2005+ STI front wheel bearing is actually a hub unit that bolts to the knuckle. It's larger and more capable of sustaining severe use.

I have a friend who had a CNC mill that he used to make his e36 hubs 5x114.3 so Im not too worried about the drilling.

Gotcha. I was hoping there was going to be some geometrical advantage to swapping to 05-07.

[rebeccasavannah]

this is a lot of good info...good job. Keeping this for future reference.

[Drifting STI]

This is great info thanks

[BbugWag]

I know this thread is an old thread but I'm going to bump it anyway because there is good info here. My brother is really going to appreciate this! Thanks and your car is so clean!

[Gixhost]

Thanks! Glad people are getting use out of this!

[Vlad]

So, to take a 6 speed from male axles to female axles (using stubs), you have to not only do oil seals, but also sundials, as the male axle sundial has the oil seal outside and the female inside?

Did anybody just change the oil seal and keep the sundial?
as far as leave the sundial alone, pop the oil seal from the outside, insert the stub, then gently push the female axle stub oil seal over the stub, from the outside?

[JarHarms]

Originally Posted by Vlad

So, to take a 6 speed from male axles to female axles (using stubs), you have to not only do oil seals, but also sundials, as the male axle sundial has the oil seal outside and the female inside?

Did anybody just change the oil seal and keep the sundial?
as far as leave the sundial alone, pop the oil seal from the outside, insert the stub, then gently push the female axle stub oil seal over the stub, from the outside?

You can reuse your side retainers, they will work with either axle seal types. The earlier years had side retainers that install the seals from the inside so you have to remove the retainers to R&R the seals. The later version retainers can have the seals installed from the outside without removing the retainers.
Most update to the newer retainers so there is no more fussing with the backlash settings when replacing axle seals.

[Vlad]

thank you.

[AlmaSecreta]

Originally Posted by JarHarms

You can reuse your side retainers, they will work with either axle seal types. The earlier years had side retainers that install the seals from the inside so you have to remove the retainers to R&R the seals. The later version retainers can have the seals installed from the outside without removing the retainers.
Most update to the newer retainers so there is no more fussing with the backlash settings when replacing axle seals.

Great info here. Thank you for posting.

I am getting ready to do the 5x114.3 conversion on my early 04 STi (transmission with studs). It seems that I can keep my sundials and just replace the seals to 05+. Is this correct?

However, since I'd have to remove the sundials anyway, I am thinking I will just change to newer sundials. Is it the same number of turns to install the 05+ sundials as it would be if I was re-installing my early 04?

[BlueSTI4Me]

Dude, very good writeup, don't know why I'm just reading this now.


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[Ryosuk3]

Thanks for the write up. Im in the process of doing this on my 04 sti. I was wondering how you swaped out the sundials to maintian proper preload on the diff?
thanks

[Gixhost]

I wish I had an answer for you maybe someone else can chime in, Andrewtech performed the work for me.

[Ryosuk3]

ok thanks anyways

[AlmaSecreta]

Ryosuk3, if you figure out it please post your findings. I've been trying to figure it out as well. I just need suspension, axles, and to figure out the sundial thing to do my conversion.

[BlueSTI4Me]

Most guys mark and count the number of turns, then reinstall replacement sundial Sam number of turns. I'm assuming you are removing the stub shafts?


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