Alcon as well, they have a 360mm kit, that should fit 18" but not sure. But I think Brembo caliper kit is very viable after discontinuing AP.

This thread has caused me to do more reading into what makes a caliper track more or less track worthy

Apparently, the term "RadiCal" covers a wide variety of calipers made by AP racing that actually have different features, such as being a true monobloc, anodized v powder coat, brake dust boots or not, etc. differences and caliper and rotor design mean that a smaller caliper and rotor with all of these features can out perform a lesser set with more size

The brembo GT kit that uses stock size rotors actually has many race worth features and therefore, when paired with good rotors, is a true track upgrade despite not being a flashier "big brake kit" with a giant rotor

Thinking of getting the Brembo 6 pot upgrade too but according to Mike who had them installed said they are not well balanced (with the OE rears) for the track? And not all 18s will clear...

Anyone else have these installed and comment on them?

There is a 4 piston rear upgrade as well

Brake clearance depends on spoke design for a particular wheel. Diameter usually isn't the problem, at this point

Not all wheels clear akebonos either due to the specific face

I am still waiting for my stoptech trophy 380mm rotor kit to arrive. Will still use stock akebono calipers in the back. Stoptech trophy kit comes with 2 piston calipers in the rear for the 370z as opposed to 4 piston entry bbk kit so I assume stock rear calipers should do the job. I have a track event on the 26th so Im hoping I will get my hands on it before. If I do, I will share my impressions here. I decided to go with Ferodo ds1.11 up front and keeping carbotech xp8 in the rear.

Sorry a dumb question...can the 4 pot Akebonos fit in the rear?

If you mean putting the front calipers on the rear. The answer is no. They won't bolt up unless you made adapters. Then your brake balance would be all screwed up.

I see. Was thinking to get the 6 piston front BBK and possibly move the OE 4 piston to the rear lol...

Will the OE 2 piston rear be fine then with the BBK 6 up front? Track use wise

Are you actually tracking your car?

People have used the 6 piston front with the oem 2 piston rear. Think it was with the 355mm front rotors. If you use the 380mm front rotors. I think you would be better off with the 4 piston rears.

Yes it’s a track car, the OE Akebonos with Hawk HTC pads are triggering ice mode too much. Hence, looking to upgrade AP or Stoptech Trophy 6 piston kit. Ideally with 355-362mm for my 18’s.
I am planning to keep the stock rears and see how they perform.

Another question I have is, am I be able to use the Z1 2 piece rotor on a AP/Stoptech caliper? Reason is I can get the 6 pot calipers alone without their rotors.

you need to check the specs your self but i'm pretty sure they use a bigger rotor than stock

Ice mode is primarily a brake balance/driver input issue. Replacing the calipers before determining what kind of brake compound agrees with your brake systems, track, driving, and tires will 100% create more issues for you.

If I were in your position I would play around with different pad compounds before adding another variable into the equation.

Bigger calipers do look awesome though. That's 90% of why I bought a sport model lol :driving:

Thanks the info. I was going to get XP10 and XP8 to try like most people suggested but also want to upgrade the brakes as I found a deal that I don’t want to pass on...