Rear brake pads, 3.0 base

[kaj]

This company sponsors our Chin trackdays down here in FL. They claim if you call them, they can do it. I hope that's true and saves you a bunch!

G-LOC Brakes -

Their search function hasn't been working so I emailed them about a week ago. No reply, so I've been continuing my search.

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[AHP]

Topendmotorsports sells some Endless MX72s if that works for you.

I run the Endless MX72 pads in the premium brakes and they've served me well as an intermediate track day pad.

 

[32bitsofGil]

Yes they bolt right up.

If it helps, you can expand your search to M240i/M340i/M440i brakes as their standard "M-Sport" brakes are exactly the same as the Supra Premium.

Also, the upgraded "M-Motorsport" option has the same rear calipers/rotors as the Supra Premium as well.

If it helps to expand your brake pad search for base pads. I believe the 330i/430i (non m-sport) share the 330mm rear rotors of the Supra Base

https://www.bimmerworld.com/About-Us/M-Sport-Brakes-G20-G22/

If this is correct I should be able to just bolt up an entire pad/rotor combo kit?

what about this one? $800 for full rotors and pads is great compared to the $400 I was gonna spend just in replacing OE rear rotors.

https://www.rockauto.com/en/moreinfo.php?pk=8746808&cc=3445419&pt=13824

 

[razorlab]

If this is correct I should be able to just bolt up an entire pad/rotor combo kit?

what about this one? $800 for full rotors and pads is great compared to the $400 I was gonna spend just in replacing OE rear rotors.

https://www.rockauto.com/en/moreinfo.php?pk=8746808&cc=3445419&pt=13824

Yes except those rotors are a downgrade from OEM. Also, always double check the rotors are the correct size before ordering.

You should be able to find OEM rotors for cheaper than that.

BMW
Front Left: 34116860911 (348mm)
Front Right: 34116860912 (348mm)
Rear: 34216860925 (345mm)

Brembo
Front Left: 09D09413 (348mm)
Front Right: 09D09513 (348mm)
Rear: 09D09613 (345mm)

^ Both of these are the same (Brembo makes the OEM BMW rotors)

 

[kaj]

I run the Endless MX72 pads in the premium brakes and they've served me well as an intermediate track day pad.

That concerns me, as I do not go intermediate pace. ?
Plus my car is full weight.
Then again, I admit I don't know how harsh our cars are on the rear brakes with all the nannies turned off.

 

[32bitsofGil]

Yes except those rotors are a downgrade from OEM. Also, always double check the rotors are the correct size before ordering.

You should be able to find OEM rotors for cheaper than that.

BMW
Front Left: 34116860911 (348mm)
Front Right: 34116860912 (348mm)
Rear: 34216860925 (345mm)

Brembo
Front Left: 09D09413 (348mm)
Front Right: 09D09513 (348mm)
Rear: 09D09613 (345mm)

^ Both of these are the same (Brembo makes the OEM BMW rotors)

downgrade? is it because of the metal material of the rotors? assuming they are the same size

Was just hoping to order drilled and slotted rotors because I spend more time in the twisty roads lately.

I was going to order OEM brembo rotors, but they cost a ton!
https://www.rockauto.com/en/moreinfo.php?pk=10482044&cc=3446848&pt=1896&jsn=842
https://www.rockauto.com/en/moreinfo.php?pk=10482036&jsn=829

 

[kaj]

downgrade? is it because of the metal material of the rotors? assuming they are the same size

Was just hoping to order drilled and slotted rotors because I spend more time in the twisty roads lately.

I was going to order OEM brembo rotors, but they cost a ton!
https://www.rockauto.com/en/moreinfo.php?pk=10482044&cc=3446848&pt=1896&jsn=842
https://www.rockauto.com/en/moreinfo.php?pk=10482036&jsn=829

Drilled and/or slotted rotors are not going to help you with any street driving. Rotors used to be cross drilled because of old pad technology. That's not an issue anymore. If the holes aren't done right, the rotor would crack under any substantial use. Street driving would probably be fine, just saying.
Slotted rotors can be useful in certain situations but are unnecessary on the street.
My race car has standard rotors and I've never had an issue. You will be fine with standard rotors while driving through the mountains.
??
IMO: Save your money for more important things. Unless you simply like the looks of those rotors, in which case I say go for it.

 

[AHP]

That concerns me, as I do not go intermediate pace. ?
Plus my car is full weight.
Then again, I admit I don't know how harsh our cars are on the rear brakes with all the nannies turned off.

In my experience the front pads wear at least 2x the rate of the rears. If you're concerned with chipping away at every last .01 in the Red group then you should probably step up to the premium rears either way (and CSG pads). The limitation of the MX72 is they get overheated and start to smear after about 2/3 the way through a 20 minutes session. Now this is at a track that is notoriously hard on brakes. In comparison I had zero issues at VIR going all-out for 20 minutes.

Speaking of brakes... I thought the brakes on these cars were pretty impressive with just a pad/fluid upgrade. That was before I actually tracked cars with good brakes. ?

 

[32bitsofGil]

Drilled and/or slotted rotors are not going to help you with any street driving. Rotors used to be cross drilled because of old pad technology. That's not an issue anymore. If the holes aren't done right, the rotor would crack under any substantial use. Street driving would probably be fine, just saying.
Slotted rotors can be useful in certain situations but are unnecessary on the street.
My race car has standard rotors and I've never had an issue. You will be fine with standard rotors while driving through the mountains.
??
IMO: Save your money for more important things. Unless you simply like the looks of those rotors, in which case I say go for it.

ah so you think the holes and slots only weaken the rotor? I really am just looking for a single kit to replace rotors and pads. $700 seemed right on the budget for what I wanted. Seems OE type stuff I can't find that cheap

 

[kaj]

In my experience the front pads wear at least 2x the rate of the rears. If you're concerned with chipping away at every last .01 in the Red group then you should probably step up to the premium rears either way (and CSG pads). The limitation of the MX72 is they get overheated and start to smear after about 2/3 the way through a 20 minutes session. Now this is at a track that is notoriously hard on brakes. In comparison I had zero issues at VIR going all-out for 20 minutes.

Speaking of brakes... I thought the brakes on these cars were pretty impressive with just a pad/fluid upgrade. That was before I actually tracked cars with good brakes. ?

Yeeeeah..... I'll wait to find a better pad. ?
Speaking of brakes, the best brakes I've ever had on a car was on a GT350R. Between the monstrous front rear brakes, the weight, and sheer mechanical grip of the tires, that car is the first I've ever driven where I really felt myself pushing into the harness under braking. It. Was. Awesome. My Evo is a close second.

 

[razorlab]

downgrade? is it because of the metal material of the rotors? assuming they are the same size

Was just hoping to order drilled and slotted rotors because I spend more time in the twisty roads lately.

I was going to order OEM brembo rotors, but they cost a ton!
https://www.rockauto.com/en/moreinfo.php?pk=10482044&cc=3446848&pt=1896&jsn=842
https://www.rockauto.com/en/moreinfo.php?pk=10482036&jsn=829

Because they are 1 piece and the other things @kaj mentioned.

The OEM rotors are 2 piece with an iron disc pressed into an aluminum hat.

 

[kaj]

ah so you think the holes and slots only weaken the rotor? I really am just looking for a single kit to replace rotors and pads. $700 seemed right on the budget for what I wanted. Seems OE type stuff I can't find that cheap

The holes weeken the rotor if they are drilled after the rotor is cast. If the holes are cast into the rotor, that's a lot better. Either way, they aren't needed for track use and or not as robust as non cross drilled. For the street, they would do fine. Slotted rotors are fine, just not always needed for track use, definitely not needed for the street. But, both are safe enough for street driving so, if you like the looks of them, not a problem

 

[32bitsofGil]

Because they are 1 piece and the other things @kaj mentioned.

The OEM rotors are 2 piece with an iron disc pressed into an aluminum hat.

Ah okay I understand a bit better now. So the two piece has the benefits of lightweight aluminum hat, with the benefits of iron breaking surface

This is why I see two different price tiers? Two piece seems more expensive.

 

[kaj]

Ah okay I understand a bit better now. So the two piece has the benefits of lightweight aluminum hat, with the benefits of iron breaking surface

This is why I see two different price tiers? Two piece seems more expensive.

Yes, harder to manufacture, higher performance, more expensive.

 

[romanLegion9574]

That concerns me, as I do not go intermediate pace. ?
Plus my car is full weight.
Then again, I admit I don't know how harsh our cars are on the rear brakes with all the nannies turned off.

I haven't had brake fade from it at all, but the tracks in the PNW aren't as hard on the brakes as some other tracks some of the others run.

The rear brakes get a bit more use from TC kicking in, so you won't have that issue with the nannies off.

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