Rear BBK, do I really need it ?

[Clubber]

Hey guys,

Since we are on a winter break for track days, I was planning to do a full AP BBK upgrade. Fronts are given but as I understand rear 4 pistons are a little overkill and most people fit them to have a matching set and for looks. Please correct me If I am wrong.
I am sure they are better than stock setup. No question about that BUT seing new M cars even with ceramics running single piston rears made me think. Some race teams are even stating %75 percent of the stopping power is achieved with fronts and some say even more.

What are your opinions ?

P.S. I am running RS29's, SS Lines and SRF Liquid on stock setup atm.

[alexk]

I had AP front/rear BBK before I had to sell it.

I bought only front Brembo BBK and the rear is OEM.
All is ok, I didn't see any issue at the track.
The balance feels right (I do trailbraking).

I am not going to upgrade the rear ones.

[Clubber]

Originally Posted by alexk

I had AP front/rear BBK before I had to sell it.

I bought only front Brembo BBK and the rear is OEM.
All is ok, I didn't see any issue at the track.
The balance feels right (I do trailbraking).

I am not going to upgrade the rear ones.

Thanks for your input Alex,

It is very interesting that most of the vendors I get a quote from are strongly pushing me for the new AP Radi-Cal kit. They say it is superior in every way but I much prefer the classic kit for ease of finding parts and proven performance.

[shimmy]

Originally Posted by Clubber

Thanks for your input Alex,

It is very interesting that most of the vendors I get a quote from are strongly pushing me for the new AP Radi-Cal kit. They say it is superior in every way but I much prefer the classic kit for ease of finding parts and proven performance.

My kits has been fantastic, best by for the CSL by far

[0836whimper]

Not in my experience.

AP's up front, OEM at back and decent pads all round is a superb combo.

[Clubber]

Originally Posted by shimmy

My kits has been fantastic, best by for the CSL by far

That seems to be the default choice I understand.

Originally Posted by 0836whimper

Not in my experience.

AP's up front, OEM at back and decent pads all round is a superb combo.

I hope so too although I think I'll put them on each year. This year the fronts and next year the rears, fingers crossed. Unless I win the lotto and go for those new stoptech carbon seramics

[_Nathan_]

I found that the car was more settled under hard braking when I went from just front kit with OEM rears to having the 4 pot rears too, the car seems to dive less, less weight transfer to the front.