Our Essex Designed AP Racing Radi-CAL setup is the most advanced and capable setup available at any price. If you want to do it once and do it right the first time, it's the choice.
On these cars, the front brakes are the primary concern, and you'll be far better served going with the absolute best front solution you can afford vs. going with a mediocre solution at all four corners. Most people burn through several sets of front pads for every rear set they consume. A good front kit that is properly designed and integrated with the OEM rear will give you the best return on your money spent.
I'd recommend
our CP9660/372mm kit if you're running standard 20-30 minute HPDE sessions. This system fits inside many 18" wheels. The Radi-CAL calipers are the current state-of-the-art in caliper technology, ultra lightweight, a million pad choices, and are stiffer and run cooler than anything else. The AP J Hook discs have 84 vanes, flow a ton of air, and reasonably priced to replace when you eventually crack them. We also hold a lot of inventory, so you don't have to worry about not being able to get them when you need them.
If you want a thicker pad, you can go with
our CP9668/372mm kit that features a 25mm thick pad. Wheel fitment isn't as good with that one though.
You can see lots more on our brake kits in this thread:
https://www.m3post.com/forums/showth...ighlight=essex
We have tons of e92 M3s all over the world running our setup successfully. They've run the 25 Hours of Thunderhill, have won many races and time trials, and are essentially the same as what is being run on the TCR cars in Pirelli World Challenge. They will take any abuse you can throw at them and ask for more.
You can see some of them in action on our blog on all different types of cars:
https://www.essexparts.com/news-blog
StopTech is a budget choice, and doesn't have anywhere near the features of the AP equipment. The PFC setup is based around twenty year old caliper technology, and almost as expensive. Both of those kits will also weigh more than the AP Racing setup, and spares won't be as accessible and will cost at least as much.
Our systems are widely considered the final solution for most people. They come to us when they're tired of fooling around with their car and want something that they no longer have to think about.
If you have more questions, feel free to PM or
email me.
Here are some pics of them on cars so you can see how they look:
Over the years the vast majority of factory-built BMW racecars come with AP Racing Radi-CALs as well, and that's at all levels of motorsport:
