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2018 Caliper retrofit -  MBC/Wheel size, rotor, pads.
2018 Caliper retrofit -  MBC/Wheel size, rotor, pads.
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Old 05-19-17, 07:30 AM   #1
BriEE
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Default 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

I'm starting a thread on this to gather info for doing a retrofit from 2018 new brakes to 2015-2017 models.

Things to figure out:

-Require new MBC? Proportional valve difference?
-Rotor size difference? Is there any or just the caliper has 6 vs 4 pistons
-Brake pad size
-Does current 18" wheels fit with the new brakes?
-Possible to remove the ugly yellow color? (LOL)

Are these brakes more worth it to swap or better to get aftermarket 6 pistons.

I estimate these are around $900 each side just for calipers. I've bought the current model year calipers before so I'm basing on this price.
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Old 05-19-17, 01:54 PM   #2
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

But why tho? Previous brembos did a great job for past 10+ years...
No reason to swap brembos to another brembos...

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Old 05-19-17, 03:01 PM   #3
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

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Originally Posted by RussellX View Post
But why tho? Previous brembos did a great job for past 10+ years...
No reason to swap brembos to another brembos...

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I agree. I think the biggest difference would just be the looks. Drilled rotors and yellow calipers are just bling items.

4 pistons can exert the same amount of force as 6 pistons, it's just that 6 pistons have the ability to spread that out over a larger area. But that doesn't necessarily mean shorter braking distances.

Using better pads and fluid and adding ducting to cool your current setup would be a better performance upgrade. But to each his own.
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Old 05-19-17, 07:03 PM   #4
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Probably better for braking in decreasing radius corners. I am interested in seeing the differences in the brakes as the tests and real world examples come out. Whether it is cost effective to get aftermarket or for more than just a visual change. If nothing else the cost of parts will probably go up which is why having parts that have been used for 10 years is nice.
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Old 06-19-17, 01:05 PM   #5
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

I'm not sure if these are up to par as the Type-RA or the ones on the s20x ones in Japan, they all came with 6pots.

These should theoretically have more surface area pad.
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Old 06-19-17, 02:14 PM   #6
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Rotor Dimensions 2018 vs 2015-2017:

Front Brembo 6 piston
2018 - 340mmx30mm (vs 2015-2017 - 326mmx30)

Rear Brembo 2 piston
2018 - 326mmx20mm (vs 2015-2017 - 316mmx20mm)
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Old 06-19-17, 03:11 PM   #7
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Quote:
Originally Posted by BriEE View Post
I'm starting a thread on this to gather info for doing a retrofit from 2018 new brakes to 2015-2017 models.

Things to figure out:

-Require new MBC? Proportional valve difference?
-Rotor size difference? Is there any or just the caliper has 6 vs 4 pistons
-Brake pad size
-Does current 18" wheels fit with the new brakes?
-Possible to remove the ugly yellow color? (LOL)

Are these brakes more worth it to swap or better to get aftermarket 6 pistons.

I estimate these are around $900 each side just for calipers. I've bought the current model year calipers before so I'm basing on this price.
18" wheels will fit over new OEM 6 pots: 2018 STI Brembos

Rotor is bigger as mentioned in an earlier post.

Just as you have alluded to, I'm sure the OEM calipers won't be cheap; why not look at the AP racing brake kit instead?
http://www.subispeed.com/2015-subaru...015-wrx-simple

You get slotted instead of bullshit cross-drilled: https://mechanics.stackexchange.com/a/9198
Plus, a claimed 24lbs of unsprung weight savings for the front axle.

Last edited by raisingAnarchy; 06-19-17 at 04:15 PM.
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Old 06-19-17, 04:08 PM   #8
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Agree. I'd rather go with AP Racing over 2018 brales
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Old 06-19-17, 04:14 PM   #9
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Quote:
Originally Posted by Got5onit View Post
Probably better for braking in decreasing radius corners. I am interested in seeing the differences in the brakes as the tests and real world examples come out.
How would the newer calipers/rotors/pads affect that?
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Old 06-19-17, 04:34 PM   #10
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Default Re: 2018 Caliper retrofit - MBC/Wheel size, rotor, pads.

Quote:
Originally Posted by TgrClw View Post
Agree. I'd rather go with AP Racing over 2018 brales
So would most people. But one of the big draws here is that barely used 2018 STI brake calipers may start showing up in the classifieds for cheap.

So if you could do the whole upgrade for $1,000-$1,200, all-in, using all OEM parts, then is it worth it? Maybe.
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