Q: Are you looking to make your wheel selection a little broader?
A: Yes. We all are. 5x100 isn't all that great. It's nice that recently (since the WRX became incredibly popular and the 86 chassis increased the desire for 5x100) more wheels have become available. Still, this doesn't change that 5x114/5x4.5" has been the norm for a long time and there are thousands of great used wheel options out there in that fitment.
**Note: The calipers pictured are not the standard calipers. They are the FHI 4pot/2pot that came on the usdm 06-07 WRX and a whole boatload of jdm cars. There are a ton of pics of 86 cars at auto shows with these on around their time of vehicle launch. They utilize the 290mm'ish rotors that came stock. You do not need to change rotors to run this brake setup if staying 5x100. Not trying to create any confusion with the "stock brakes statement. Moreso; this is how to go to 5x114 with stock diameter/offset/dimension discs.
So what are we going to do about it?
Make our cars 5x114.
What do we need for parts?
2x 2008-2014 Impreza WRX STi rear wheel bearings
->OEM p#28473-va000 or look it up on Rockauto.com if you aren't a stickler for OEM
->link to OEM:
https://www.parts.com/index.cfm?fuse...rotor-HUB-ASSY
2x PBM front 5x114 hubs
->link to PartsShopMax
https://store.partsshopmax.com/shop/...s/ZNC6HUB.html
2x KNS Brakes DBA 4651 Front Rotors. p#KNS4651
These are unlisted on the KNS website. You can get them from various vendors who sell them for STi gravel spec setups. Your best value is to call KNS and talk to Ken. He will set you up.
Link:
https://www.knsbrakes.com/c/item-ser...+Rotor/KNS4651
2x KNS DBA 2663-10 Rear Rotors. p#KNS2663-10
Same as above. You can find the slotted version through many vendors but to have a smooth rotor to match your front it is best to call Ken. He seriously is the man. He has been my source for multiple FHI 4/2 and Brembo fitment/conversions. Dude has the parts on the shelf and makes life so much easier.
Link:
https://www.knsbrakes.com/c/item-ser...tor/KNS2663-10
Now that you have the parts on hand; get the car lifted and supported.
Remove your regamasters or whatever wheel you have on there that will be allocated to "coolest coffee table ever" status.
Front:
Remove the 2 17mm head bolts that hold the caliper in place. Hang the caliper from the spring with a ziptie to not stress the brake hose.
Take 2 m8x1.25 (12mm head) bolts and thread them into the rotor to pull it away from the hub face.
Remove the rotor.
Remove the 10mm head bolt that holds the abs sensor in place. Slide the sensor out.
<no photo - it was too dark>
Remove the 4 14mm head bolts that attach the hub assembly to the knuckle.
Assemble in reverse. The disc drilling guide that is included with the PBM Hubs is not needed. Use it as a beer coaster when you have the job done.
Rear:
Similar to the front but with a touch more nuance.
Remove the caliper and support it.
Remove the rotor.
Remove the axle nut.
From the rear, remove the 4 14mm bolts holding the hub to the knuckle. The backing plate and hub will likely fall together. A couple knocks with a deadblow will get it unstuck.
Reassemble in reverse. Don't forget to swap the rubber inspection plug from the old rotor to the new.
Bolt on your TE's and torque them to spec and pull the car outside to take a picture.
All totaled, this swap cost $905 in parts and about 2 hours of me milling about the garage with some basic tools.
As pointed out by @JoeBro there is necessary clearancing for the stock caliper brackets.
https://www.ft86club.com/forums/show...9&postcount=20