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Old 06-14-2005, 06:35 PM   #1
leoflc
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Default What's the differences between JDM and USDM WRX's brakes?

I've seen some pics of JDM wrx, and I noticed that their brakes are red.
So I was just wondering is there any differences b/t JDM's brakes and USDM's?

Thanks!
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Old 06-14-2005, 09:35 PM   #2
yobtah
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A Japanese-market WRX usually has red or black 4-piston front calipers and red or black 2-piston rear calipers. Both the front and rear calipers have "SUBARU" machined in the faces. I believe the rotors for this setup are the same as the US WRX rotors.

Supposedly, at least the front 4-piston brakes (not sure about the rears) actually generate less torque than the 2-piston US WRX brakes. The upside is that they're lighter and easier to modulate.

Note that this is a different brake setup from the US STi Brembo setup. The "plain" JDM WRX brakes are manfactured by FHI... not Brembo. The US STi's Brembos are included on the JDM STi Spec C and possibly the RA.
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Old 06-14-2005, 10:10 PM   #3
fourdegrees
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The JDM non-sti 4pot is available at most Subaru vendors. They use the standard WRX rotor, and are simple bolt ons for the WRX. The rears are a bit more tricky, in that they need the backing plate pressed off of the hub, and new ones pressed back in to get the proper mounting whole spacing. Although this sucks, similar brake torque can be gained by using the H6 rotor upgrade. This uses the stock WRX rear brake caliper, but uses a different bracket to allow for the use of a larger rotor. The only disadvantage to this setup is that it is not a ventilated rotor like the JDM setup.
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Old 06-14-2005, 10:12 PM   #4
fourdegrees
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Most folks will agree, though, that the setup above is the most cost efficient upgrade for a street driven WRX. The parts are all oem and rebuildable and the consummables are very reasonably priced vs the STi setup on the USDM STi's.
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Old 06-15-2005, 12:21 AM   #5
leoflc
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Thanks!

But are the subaru 4-piston front calipers worth the upgrade compare to the USDM front brakes (besides they look better)?

Thanks again!
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Old 06-15-2005, 01:11 AM   #6
fourdegrees
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In general I would say yes. Better caliper design, opposed pistons give a better feel, than our standard sliding caliper. I wouldn't be concerned about the loss in brake torque either. Most folks on this board will tell you that moving some of the bias towards the rear will help improve braking. Not as much as good tires, but there will be a positive effect. The stoptech BBK moves more bias rear than the subaru 4pots do, and they are considered the most effective brake upgrade. If you search for "4pot" or "4-pots" you will find pages and pages of discussion.
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Old 06-15-2005, 01:12 AM   #7
fourdegrees
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Of course you could always start with the tried and true better pads, steel lines, and better fluid. Most street driven folks seem really happy with this setup as well.
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Old 06-15-2005, 06:36 AM   #8
Uncle Scotty
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Quote:
Originally Posted by fourdegrees
Most folks will agree, though, that the setup above is the most cost efficient upgrade for a street driven WRX. The parts are all oem and rebuildable and the consummables are very reasonably priced vs the STi setup on the USDM STi's.

If I were to get a 'new'(year irrelevant), un-modded WRX.....the h6 rear mod would be high on the list of first mods I'd do to it
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Old 04-21-2023, 01:25 AM   #9
4rider
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I think there is a mistake. I dont think the rear wrx 2 pot brakes ever came with the "Subaru" emblem machined or "groomed".
Please correct me if I am wrong as I wish they exist since this i what I am looking for.
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