[M3SQRD]

Originally Posted by omgzirra_exe

GiroDisc 2-piece front rotors with OEM calipers are exactly what you need.

This is definitely one of the better, and more cost effective, options for a car with a 50:50 street-track split. A major advantage is not having to worry about winter use with this setup.

Brake management isn’t just about the brakes themselves. It's also about tires and suspension. The only thing you don’t get with this setup is the ability to flex a big brake kit, and honestly, that’s all it is. Just flex.

F8X retrofits and other conversions are a waste of time and money.

From my experience on student cars, IMO the f8x standard blue retrofit is actually a decent upgrade. You get calipers that make pad swaps easier and larger 380 mm OD front rotors (oem or GiroDisc or Paragon) and 370 mm OD rear rotors (oem or GiroDisc or Paragon). Another advantage, just like e9x M brake setup, is you can use this setup in all seasons without having to worry about protecting inner seals. The f8x 2NK/2NH 6-piston and 4-piston brake setups may be an option on the e9x M if Track/S offers caliper mounting brackets that work with his custom 380 mm OD GiroDisc (and I believe Paragon) front rotors which allows the use of 18” wheels. This would be an excellent option for the e9x M with more capability (fade resistance) than the f8x standard blue brake setup and the ability to run this setup yearly without concern. Only disadvantage is the calipers have to be removed to swap pads.

If you really want to do it right, go straight to something like AP 9668, Alcon CR6420, or even Paragon. Otherwise, keep it simple and effective.

CP9668/CP9449 and CR6420/CAR4949 are the best track options. Paragon PA025 only uses an 18 mm thick pad and I’ve read they have a high pad wear rate. However, you have to pay close attention to, and clean well, the pistons before pushing them back into the caliper. This applies to the track season, especially after a track event with rain, street use, and the winter season. I personally would not use them on the street if the streets have been pre-treated with brine/salt and there’s still salt on the road after an ice/snow storm.

I also don't recommend stoptech BBK to anyone since they are not producing any parts for them anymore. so don't bother buying second hand ones.

I agree. Don’t buy a StopTech brake kit. StopTech has had supply chain issues for at least the past two years and, for a little over a year now, they have stopped supporting kits that use the wide-annulus rotor rings. This forces owners to use custom rotors from Coleman Racing and, potentially, GiroDisc and Paragon (if they already don’t offer replacement StopTech rings for that application).