I am currently in the market for a new BBK and was attracted to the R1 Concept kit. Their kits are very reasonably priced with many great color options for both caliper and rotors. I run their OEM fitment/spec slotted and drilled rotors and pads on my 06 GS300 and noticed a great difference from the OE blanks. I understand that these are two completely different cars. Not being able to find anything about them track review wise, was curious what everyone's input is?

I am currently N/A but will be looking to boost it (450-500hp) within the next year or so, with that said I just want a kit that is going to be well worth the money spent. I have thought about doing both a front and rear kit conversion, however I've ran into mixed information regarding braking bias. The car will see around 5-7 days of full day tracking and wanted to make sure it can hold up. Project Mu and ENDLESS are premium kits but also cost a pretty penny. AP racing offers a kit for the S2K but not sure if the kit from AP Racing/Essex is any good. Stoptechs I hear are really good as well, just looking to try something different.

R1 calipers come standard with aluminum pistons, but for a small fee it can be switched out for stainless steel pistons, and Anti-Knock Back springs. Just curious as I am trying to make a wise and responsible investment.

 

I would rank AP & Stoptech over Mu & Endless. I think Mu and Endless are just good at marketing.
R1 also looks like a broker of sorts, and I doubt they would be used by many in R&C unless they are sponsored by them.

I would also not categorize these parts as an investment.

 

R1 concepts shouldn't be mentioned in the same sentence with any of the other brands you've just mentioned.