That's a setup that is suitable for beginners only. Stoptech pads are street pads.

A BBK is cheaper to operate in the long run, compared to stock brakes, if you're have a moderate amount of experience at the track. Pad and rotor replacement intervals get a lot longer, saving you money in consumable cost.

The biggest question I don't think anyone has asked is: What kind and what size tires do you run?

- Andy

Absolutely no need for a rear BBK unless weight savings is your goal. This assumes a properly engineered front system of course. If you change the brake bias enough then it might make sense, but that's pointless on these cars IMO.

For me, the Essex Sprint kit, or the the Endurance kit if you are concerned that the Sprint kit isn't enough, are still my preferred systems for these cars.

Unless you decide to see how much abuse the Sprint kit can take.. then you might crack a rotor with stock power, sticky tires and 1300+ degree rotors ;)

Wow thanks for the info guys. Especially Jeff from Essex. I'm leaning towards getting the Essex AP Racing kit, now I need to decide if I need the Sprint or Endurance. I really want to upgrade because as CSG Mike told me in his PM, it's better to have more braking capacity then not have it when you need it. I have overshot the backstraight at the track twice already, so I guess i was kind of traumatized with that. This was with stock pads though. Luckily the runoff was big enough and there was no damage.

Right now I'm running 255/35/18 Bridgestone Potenzas. I've already worn out the rears so I will be switching them out for Pilot Super Sports. No R compound for me right now because I'd like to sharpen my skills (or lack thereof :) ) with street tires first.

Does Sprint kit fit under any 17x8 wheels?

Yeah, I run RPF1 and Kosei K4R's in 17x8 with them. There's a fitment thread, stickied I think that lists some other wheels.

As long as you don't have so much that the brakes cool down TOO much :) unlikely though given the car and the reasonable size of the Endurance kit.

I'll probably end up with the Endurance kit for my M3. DDs need that right? ;)

Stock rotors with dixcel ES pads do well for about 5-6 laps. After that, the pads fade. The SC adds at least 20-30kph to the top speed of the car. I now reach 200kph on the straight at CIS. Slowing the car down takes much more than NA. I needed to adjust my braking points to compensate. I brake a lot earlier now. Hopefully adding a bbk would bring me back to my previous braking points.

No problem...that's why we're here.:thumbsup: We've gone through this same situation 1000 times with other customers. As for future-proofing, the Endurance kit is exactly that. I have evo's, STI's, Z06's, and asphalt late models with 500-600 hp running the same 325x32mm discs that are included in that system. There is no way you'll ever exceed the limits of that system. Here are a few examples of customer cars on those discs, including some on-track video from races:
463 rwhp C5 Z06
C5 Z06
More C5 Z06's
497 hp Lancer Evo
E46 M3's (I went for a ride in one of the M3's which was putting out over 500hp...it was nuts when the turbo spooled! :O )

That said, the Sprint Kit is no slouch either. These cars were actually using the CP3862 discs from the Sprint Kit!
Some late model race wins

Yes, both the Sprint and Endurance Kits fit tons of wheels. Below is a list of some of the ones we've confirmed, but there are many others out there:

Sprint Kit fits without spacer
Name size offset
Enkei RPF1 17x8 45
Enkei RPF1 (very tight fit, but works) 17x9 35
Enkei Fujin 17x7.5 40
Kosei K4R 17x8 36
Mach V Motorsports "Awesome" wheel 17x9 42
Rays CE28N 18x7.5 47
Sparco (designed by OZ) Assetto Gara 17x7.5 48
Subaru OEM STI Wheels (2004) 17x7.5 53
Team Dynamic 1.2 17x7 38
Volk Racing TE37RT 17x9.5 +40
Wedsport TC105n 17x9 35
Work Ultimates 18x8.5 47


Endurance Kit fits without spacer
Name size offset
BBS CH-R 18x8 38
Enkei Fujin 17x7.5 40
Enkei RPF1 17x8 45
Mach V Awesome 17x9
Rays CE28N 18x7.5 47

We offer wheel fitment templates for each kit if a customer wants to check clearance:
Sprint Kit wheel fitment template

Endurance Kit wheel fitment template

We used ours under 17x8 +45 RPF1 for a long time :)

A BBK won't shorter stopping distances in most cases, so unless you've adjusted your braking points to try to keep the pads cooler it won't have much effect there. Unless your current brakes can't engage ABS, adding more stopping power won't shorten braking distances.

Braking earlier (and longer) also adds more heat to the brakes than braking later does in some cases (depends how hard you're on the brakes in both cases).

Thanks @wparsons! Good to hear that. Now I'm really confused! Haha!