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Brembo 305 GT Sport discs - any good?

Hi guys,

I was thinking of trying out the Brembo GT Sport discs, in the 305 mm guise which is my car's setup.
Do you guys think it's worth the or should I go for regular Brembos?

Does anyone know if the warping issue is solved in the GT Sports?

Thanks in advance for your help.

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Do you do trackdays or any racing ?

I had them on my GTA, and I did not like them. The brakepad dust got stuck in the holes, and did not aid the cooling as they should.
In the end, they cracked on me, and I replaced them with EBC Ultimax, which work well.

The EBC ones are rather heavy (which is not good) but on the other hand they do allow for heavy braking, which the GTA (being a heavy car) needs.
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(Post Link) post #3 of 8 Old 13-12-17 Thread Starter
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Hi cannotstop,

I do occasionally track the car, but not as much as I'd like to...
(check out this video: for some reason I can't seem to upload the video on here, so if you want just do a YouTube search with these terms: "Alfa Romeo 156 3.0 V6 - Estoril 2017-04-08")

But it's more of a (sometimes fast) road cruiser than anything else.

Thanks for your advice.
I do use their pads (YS) and love them.

About their discs, I can see three versions:
- Regular
- Slotted and dimpled
- USR Slotted

Which one would you recommend?


Last edited by bernas68; 13-12-17 at 18:04.
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Well, I have only used the Ultimax discs, so I cant say much about the others
The "dimples" are only for show, as they do not disperse heat, nor do they much to stop glazing (which is what the slots do) So I would go for the Ultimax discs, but of course, they are more expensive.

Estoril is a nice track, but you need some clean track to go fast

Here is me on my local track:
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You can open the brake callipers and make them for 330mm discs...you also need a new adapter.

305mm are not good in my opinion, have used them on my 147 QVD and made them 330mm much better and a must for track days. 305 are not good for heavy track use
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Yes, but that was not the question asked
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(Post Link) post #7 of 8 Old 18-12-17 Thread Starter
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I do understand that the 330's are way better than the 305's KGB, and thank you for your tip on modding the 305's, but I just switched to 305's and would like to try and see if these are enough for the kind of usage the car has.
Maybe if I'm not convinced or satisfied with the outcome I'll re-upgrade to 330's, but for now I'd like to give the 305's a chance.

Cannotstop, it's funny that I actually stumbled on one of your videos before you shared it here. That's some pretty interesting driving there! Kudos
Used to have a Selespeed (not the GTA version) but I never took it to the track...

Another thing that's been on my mind, I removed the splash guard from the discs, not so much for the splash but more to try and cool the discs faster. TBH I'm not very sure about this...
Do you recon I'd get more cooling with the guards in situ?
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The 330's are way heavier than the 305mm.

I race with 305mm EBC Ultimax discs and Endless ME20 pads that squeal with light brake application, but stop very well from way cold to way hot - no brake fade. In 15min track sessions I get OEM 305mm brakes to fade, but even 285mm single piston calipers with EBC Yellow or DS 2500 can handle 20min sessions. The problem lies with the pads, not discs. I did race a while on OEM discs, ME20 pads that worked OK until one disc seared off its brake "hat" . In their defense, those discs were old and had a rough life.

I do not have the splash plates on my racer. I am yet to add cooling ducts, but that is low priority for me.
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