Is there any special modifications needed to install the Wilwood 2pot rear brakes? Anyone have this kit? Thanks

free bump. All I know is that they require at least 16 inchers :)

I think that 16 inchers are the only requirement, and a hefty bankroll, those breaks are not cheap.

Pete

wilwood 2 pot? I'm only aware of the wilwoord 4 pot rear kit.. which you can put stock 16" wheels over (of course you cant fit stock wheels over the front kit, but ...)

edit: also, they are a Beotch to install.. the brake lines will not fit into the original clips (I have mine zip-tied to the struts), but beyond that I am not aware of anything..

http://www.altasports.net/subaru/brakes/PERRIN.htm



Are these them??

There is a 6/4pot set put out by Wilwood using larger non-OEM rotors.

Then there is the Perrin/Wilwood 4/2set using the 4pot from the above set on the front with the stock WRX rotor(294x24mm) and a 2pot caliper(used mostly in karting) with the 2000+ Legacy rear disc(290x10mm) in the rear.

IMO I would spend the extra money and get the STi 2pot rears with the 290x18mm vented rotor.

k.

Front(both kits use 294x24mm WRX rotor)

Wilwood 4pot $550 rotors not included
STi 4pot $600 rotors not included

Rear

Wilwood 2pot $650 290x10mm oem rotor included
STi 2pot $1000 290x18mm oem rotor included

k.

Originally posted by Kobayashi
Front(both kits use 294x24mm WRX rotor)

Wilwood 4pot $550 rotors not included
STi 4pot $600 rotors not included

Rear

Wilwood 2pot $650 290x10mm oem rotor included
STi 2pot $1000 290x18mm oem rotor included

k.

Anyone know why rears cost so much?

I beleive the cost difference is for several reasons.

They are rarer.

Up until recently to use this setup on an R160 rear assembly car you had to go to the aftermarket for an expensive set of compatible backing plates. Subaru now offers an oem application(and of course the correct backing plates) to use the 2pots on an R160 rear assembly. So before the 2pot kits were running $1400 using the MRT backing plates, now you can buy the kit for $1000 using oem backing plates.

Now, that also brings us to the main reason they cost more.

4pot front kit includes: calipers, pads and hardware.(use WRX rotors-not included at that price)
2pot rear kit includes: calipers, pads, hardware, new larger rotors, and correct backing plates.

So the additional cost is in the rotors and backing plates. $1000 for this setup is actually pretty fairly priced.

k.

I just purchased the perrin/wilwood 4 pot kit. Can anyone reccomend a good street rotor that will see a track day here and there? Thanks. Also how much of a pain will installing these things be?

DBA 4000 club spec rotor. And as far as installing the kit, bolt on and bleed the front brakes-done.

k.

Originally posted by Kobayashi
DBA 4000 club spec rotor. And as far as installing the kit, bolt on and bleed the front brakes-done.

k.

Thanks Kobayashi! Can you reccomend a vendor?

MPJperformance.com

Originally posted by PimpWagon
MPJperformance.com

Thanks Pimp Wagon.

Hey so does anyone know if there are special modifications needed to install the Wilwood 2-piston rear brake upgrade? I think they use larger rotors off a Legacy in the kit.

Originally posted by Kobayashi
Front(both kits use 294x24mm WRX rotor)

Wilwood 4pot $550 rotors not included
STi 4pot $600 rotors not included

Rear

Wilwood 2pot $650 290x10mm oem rotor included
STi 2pot $1000 290x18mm oem rotor included

k.

I hope that you know that you need to upgrade your dust shields if you want the 290mm rear rotor to fit. Or you can do what most people do, which is cut your dust sheild where the welds are. <--This is something that I do not recommend.

Originally posted by ImprezaRSDriver
I hope that you know that you need to upgrade your dust shields if you want the 290mm rear rotor to fit. Or you can do what most people do, which is cut your dust sheild where the welds are. <--This is something that I do not recommend.

The $1000 I quoted includes the new BACKING PLATES with the larger 290mm dust shield spot welded at its perimeter. You can not bolt the 2pot rears to the stock backing plates. You have to swap the backing plates which requires pressing the hub out of the knuckle.

I removed the dust shields on the rear of my car for my (bolt-on) GT-B rear upgrade with my bare hands. Just twisted the thin metal until the welds gave up. I personally think their removal is a non-issue in terms of durability.

The rear backing plate/dust shield combo seems to confuse a lot of people. Just as a refresher, the center section of the stock backing plate is made of heavy stamped steel and is bolted to the knuckle and has integral 5.75" spaced mounting holes for use with any of the sliding rear calipers. The backing plate for the STi 2pots is similar but has 4.5" mounting hole spacing farther out from the center and a larger sheet metal dust shield spot welded at the perimeter.

k.

Originally posted by push2
Thanks Kobayashi! Can you reccomend a vendor?

The 4000s have been back-ordered but you might also try Ninos Auto Accessories.

k.

Originally posted by PimpWagon
Hey so does anyone know if there are special modifications needed to install the Wilwood 2-piston rear brake upgrade? I think they use larger rotors off a Legacy in the kit.

You need to either trim, bend, or remove the rear dust shield, then the Perrin bracket/Wilwood caliper bolts in the stock mounting holes on the backing plate.

Again, I have reservations about this setup. I think even the "H6" upgrade would be preferable to this kit.

k.

I think that if you do any upgrade you should do it right. I mean that if you should use the correct dust shield, mounting points, etc. Because when things are designed they are deisgned for a reason. I feel that if you remove the dust shield portion of the rear bracket, you increase the chance of getting something like a stone caught between the pads and rotor. Even though you might think that removing that piece will help out airflow, it probably does almost nothing but provide a bit more protection.

I appreciate your caution ImprezaRSDriver. Do you also shower in a bathing suit?

In my case (BG Legacy) and in the case of any USDM WRX or GC Impreza owner, there is not in existence any rear backing plates for "correctly" mounting the 290mm rear rotors with the sliding single pot rear calipers on our cars. Unless you are willing to sacrifice your rear ABS pickups for the "correct" 290mm dust shield. The BE/H Legacys from which these parts would be sourced use entirely different rear ABS pickups.

The removal of the rear dust shields I still feel is a non-issue.

k.

Nah, no bathing suit. lolz

But you have to admit that it never hurts to be safe.