• Company - BBK Cost - Rotor Size - Ring Replacement Cost
• Alcon $2555 332x28 $1099 (pair) 550 ea
• Ballade $1600 330x28 $300 (pair)
• Brembo GT (328) $2972 328x28 $337 ea
• Brembo GT (355) $3835 355x32 $984 (pair) 492 ea
• Brembo GT-R $8000 380x34 $542 ea
• Endless Mini $4370 324x30 $1049 (pair) 525 ea
• J's Racing $5167 324x30 $1049 (pair) 525 ea
• Project Mu $3325 332x28 ??? ea
• Renegade X APG $2375 330x28 $690 (pair) 345 ea
• SBG APR CP8350 $2850 325x32 $490 (pair) 245 ea
• SBG Wilwood $1350 325x32 $490 (pair) 245 ea
• Spoon Monoblock $1600 OEM $21 ea
• StopTech ST40 328 $2228 328x28 $278 ea
• StopTech ST40 355 $2920 355x32 $370 ea
• StopTech C43 309 $2336 309x32 $140 ea
• Wilwood BBK Narrow $1916 328x28 $219 ea
• Wilwood BBK Thermlock $2458 328x32 $248 ea
• URGE AP R CP8350 $2400 299x32 $193 ea
• URGE AP R CP7472 $3800 338x26 $329 ea

I made a list of BBK's, their current prices as of July 2021, their rotor size, and the cost of replacement rotor rings. Use the information how you wish.

I did not factor in replacement pads because then my list would get too large. I did not bother to try linking caliper templates as not every BBK has as wheel template either. I'm aware you are able to purchase some of these BBK's on sale but I tried to list the standard advertised/MSRP price.
This was just going to sit in an excel sheet on my computer, but I figure it's better if I share it. I may attempt to make a list of rear options as well on a lonely cold stormy night.

Feel free to add options, discuss, or start a fight about BBKs

 

There's an aerovane rotor option for the c43 now at 280 msrp
https://www.s2ki.com/forums/s2000-br...ption-1208716/

 

ST40 Kit. It works. Arguably the best bang for the buck. No doubt there are better kits, but it's hard to beat this consumables ratio.

https://www.s2ki.com/forums/s2000-ra...0-etc-1202612/

From this thread.

 

I wasn't able to find out how to conveniently order those rotor rings. I went to their site but it seems you may have to order from Centric/Stoptech directly.
I also had a difficult time finding rings at an online shop for Project Mu and you similarly have to order from Project Mu USA.

I wanted my first post to be completely unbiased, but yes, ST40 has a good price:consumable ratio and are further from the hub and take up less horizontal space which gives you more wheel options.

I've also been searching for wheel templates to save onto my computer to hopefully make a library.
I asked Wilwood to provide me a template but they did not have one. Instead, they had dimensions to make a rough template. If there is someone with a factory Thermlock Wilwood BBK I'd be thankful if they made a template the way Mountain-man made his for the Spoon Calipers and we could verify the dimensions provided by Wilwood, please contact me via DM.

 

I was just starting to look into these. The ST40s to me seem to be the "best" kit for consumable cost and longevity. The fact they are one of the few with dust boots also helps.

The SBG Willwoods look to be a great kit especially combined with their RX8/S197 rear kit. The calipers themselves are cheap enough to replace if needed and the 20mm pads are nice but I have heard the clearance is annoyingly worse and pads have some tapered wear around the edges causing pedal feel to be great initially then more vauge.

I street drive my car a lot on my AP2v1s so I'm probably a minority when looking for a BBK that fits those with some spacers. My K8R's are hideous but great wheels for autocross or track days with great BBK clearance. I just wish they had a center cap!

 

Well if you use them on track enough, you wont have centercaps on many wheels lol. Already forgot to pop them out and lost a center cap on my 949's. And on the TRM C3's just gave up on center caps. Even autox causes those to pop out. The little plastic tabs get deformed with heat over time and they just get looser. The 949s at least have a metal spring thing to help, but still lost one at a track day because I forgot to take them out and another has the tabs badly warped.

My issue with eventually going to a BBK is of course wheel fitment. Already own a set of 949 6ULRs and TRM C3's so would suck to not be able to run a set of wheels that I already own!

 

ST40 (328x28mm) rotor rings can be found everywhere, including amazon. Deals can be had as well with enough digging and searching.

Pad selection is awesome too since the pad shape and caliper design is based off of the 964/993 Carrera brakes.

Overall, it's a design that's proven and works and has been adapted for use on tons of different chassis with just a bracket change.

As a whole package - braking performance, pad support, consumables support, consumables price/longevity/wear-characteristics, etc. - it really is tough to beat the ST40 with 2-piece rotors.

 

This will sound like a total noob question, but when talking about the Stoptech ST40 and how it has dust boots, does someone have a good pic showing what the dust boots look like on them? Let's just say compared to the Stoptech C43 for instance that have no dust boots.

 

BBK/Wheel fitment is what makes me apprehensive about purchasing another set of 17x9+62 TRM C3's. They float on Marketplace or S2Ki somewhat frequently but they don't work with BBK's.
The BBK Fitment thread is the best thing that we have. I know of some wheels which are designed to fit BBK's in 17x9+63 sizing but they are forged custom made.
High offset with the clearance for BBK is a mighty tall task to ask for from a 17x9 wheel. I keep on writing letters to SCCA to allow for 9.5" wheels in STR because 9" wheels are uncommon and 9.5's are much much more common and arguably accommodate a 255 tire better.

 

TSW Nurburgring