Apparently there are more than one BBK (front) available... Just wondering what are the differences with different "kit" from StopTech… like C43, ST40,
'Trophy' Kit, etc.

Also currently the best option for rear is SBG RX8 kit?

Thank you.

 

ST40 is probably the best caliper for a daily driver since it has dust boots. C43, Wilwood, and many others do not have dust boots. That said, I haven't had any issues dailying a car with dustboot-less calipers. Avoid driving them in salt situations, though.

C43 and Wilwood Superlites use the same pad shape and have much cheaper pads than the ST40 does. I am a big Wilwood fan since replacement calipers are like $150 a pop. Ran them for over a decade now and no issues. I would never buy a ST40 kit because of the cost of consumables alone.

As for rears, either the SBG kit or the Reilly Racing mustang kit is what I would recommend. I don't like the 2-piece rear vented rotor upgrade because of the cost of rotor rings.

 

c43 rotor ring replacements are silly inexpensive at 99$

 

rear RX8 kits will affect the OEM brake bias, SBG's front bbk kits are meant to be paired with the rx8 rears so they retain close to OEM bias...

There are other ways to deal with brake bias and everyone has their own preferences -- just something to be aware of

 

Thanks for the explanation.
What is a "Trophy Kit" then?

 

Effectively an evolution (lighter) of the ST kit.

According to Stoptech :"StopTech's latest racetrack and competition brake system comes with the new Trophy STR lightweight forged calipers in six-piston, four-piston and two-piston configurations. Based on the StopTech ST-60, ST-40, and ST-22 calipers, STR calipers feature the same metallurgy and design, but are engineered to provide a 20-percent reduction in weight without sacrificing stiffness or performance. STR calipers are also available in Sport Trophy kits designed for production street driven vehicles which utilize dust boots, anti-rattle rotor mounting hardware and include StopTech Street Performance brake pads. All existing StopTech kits can be ordered as Trophy or Sport Trophy kits."

I think the Trophy kits were the more track oriented ones before the new C-Type calipers were released.

 

I'm quite interested in the C43 Trophy kit but i have a few questions:

How do Spoon monoblocks compare to Stoptech C43 and ST40?

How much of a performance difference is there between the C43 and ST40, namely the Trophy

 

Depends on what you define as performance.

The Spoon Monoblocks are nice in the sense of using stock pads, however that's also a negative. You'll have the same problem with cracking rotors, heat management and wear as you do with stock calipers. C43s and ST40s have a higher heat capacity simply by design, the pads shape is generally larger so wear is reduced, the rotors are floating, etc.

For me, i kept stock calipers but went with Girodisc rotors and the wear has improved significantly. The next step up would be a kit like the C43 or ST40, the Spoon Monoblocks simply don't give enough benefits for the cost IMO.

 

Jakob pretty much said it - it really depends on how you're using the car and what you prioritize but all else equal either stoptech kit will have more thermal mass and be able to shed excess heat better while also using substantially larger pads (in terms of volume). If you're looking to reduce consumables cost as much as possible the C43 has been proven to be an excellent option but if the car is mostly street driven and you're looking to reduce the frequency in which you have to replace parts then the ST40 is likely going to be worth the weight penalty for you. The difference between the standard ST40 and the trophy kit is a bit of extra machining to take an additional ~1lb out of each caliper without reducing stiffness and they are hard anodized instead of powder coated for greater finish durability when subjected to extremely high heat. I believe we have all options in stock and ready to ship if you're interested.

-Matt M.

 

^ pretty much what Jakob and Matt said; however, I will qualify the consumables wear piece with this:

quoted from this thread.
https://www.s2ki.com/forums/s2000-ra...-kits-1204142/

And, as far as credibility goes - sickdayracing (samed) has it. Link to his youtube channel - he's the TT5 champ for his region.
https://www.youtube.com/user/samedrizvi/videos


Something else to note is that the c43 kit is loud for whatever reason. ST40 versus C43 calipers using the same Raybestos ST43 pads, and the C43 calipers are SUPER SUPER loud - no clue why. This is consistently true of multiple track enthusiasts. I'm a long time ST40 user and have found no reason to switch to the C43 kit.