[awhk]

Ask my 328i M Sport (with M Sport brakes) is arriving soon and I am thinking of upgrading the discs to the M Performance discs (bigger and perforated) front and rear. I was asking a parts shop here in Hong Kong and they said it's not possible due to the bigger disc size. In order to fit M Performance brakes, I need M Performance calipers (Orange, red or yellow ones) . Anyone can confirm this?

Thanks in advance.

[Jackson743]

I believe you do need new calipers for the larger discs.

[awhk]

That sucks!!! Maybe I should wait for aftermarket discs then.

[clarence]

No u don't. HK-spec M-sport comes with 2NH as standard. 2NH discs are straight swap with M-performance discs.
In any case, if u swap them the only gain u'll get is better looks - u'll have no performance gain at all as the sizes are the same. Also those discs are not really drilled, only slotted & dimpled.

[awhk]

Oh, thanks for your confirmation Clearance! 2-3 weeks wait for me left!!!!

[mister_k]

Originally Posted by clarence

No u don't. HK-spec M-sport comes with 2NH as standard. 2NH discs are straight swap with M-performance discs.
In any case, if u swap them the only gain u'll get is better looks - u'll have no performance gain at all as the sizes are the same. Also those discs are not really drilled, only slotted & dimpled.

can the 370x30 (Part number: 34106797603) be fitted with the standard M-sport caliper? or 345x24 (Part Number: 34206797600)?

[clarence]

Originally Posted by mister_k

can the 370x30 (Part number: 34106797603) be fitted with the standard M-sport caliper? or 345x24 (Part Number: 34206797600)?

U mean standard M-sport caliper being the standard calipers for 2NH? If so then 370 should be the front & 345 the rear. In the ETK it should say alternative part for 2NH.

[mister_k]

OK, thanks clarence!