Outstanding Kit, Tremendous Value
I've gotten about a month of street driving and one track day under my belt with the WR BBK, and I'm exceedingly happy. I went with the "track" caliper variant because I want something I can continue to push and grow in to at HPDE (and beyond?). In the track trim, this kit had all of the items on my wish list: heat resilience, caliper rigidity, fast pad changes, decreased caliper mass, increased rotor size, and a common widely-available rotor dimension. And the quality of the kit, attention to detail, and customer service are all top notch. All together, I don't think the value of this kit can be matched by anything else currently in the marketplace.
I started with the optional EBC blank rotors (hint: WR is giving a great deal on these as compared to separate/retail) and was really impressed (casting has improved cooling over the OE Si rotor), but the awesome thing is just how many 3rd party 350z rotor options are available. There are some super high-quality true 2-piece floating rotors from a couple vendors, but I also love the flexibility of being able to get 1-piece blanks off-the-shelf either in a pinch or to keep consumable costs down. Love having the ability to choose in the future as my adventures continue.
My Si is still stock tune & power, but comparing braking data (as captured by my Racebox mini) from my OE Si braking system, I saw a substantial increase in braking consistency in the captured data (looking at peak braking G-forces) over the course of a 25-minute session on track after upgrading to the WR BBK. I was really surprised how big of a change there was, and even on a stock tune! Can only imagine how bad everyone with a tune is cooking their OE brakes. Having brakes that stopped the same over the entire session really helped me to dial-in my turn-in, and finally consistently start hitting my apexes in the big braking zones. Super happy with how this kit was able to transform braking on track. I went with the RP-1 pad, which was a very easy transition from a carbotech XP8 that I had been using with the OE Si brakes. But I would not hesitate to try the RP-X first if you're someone who was using an XP10+ or equivalent with a little more bite.
I'm running a Konig Hypergram 17x9 +40 as my track wheels, and they clear this kit without spacers on my 2020 Si. For street wheels, my OE 2020 Si wheels clear the kit with a 20mm spacer.
Needed just a little bit of grease on the edges of my redstuff pads to eliminate a little bit of squealing on the street. But after I did that, even the "track" caliper variant is silent and works great for daily driving.
If you've read this far, its time to pull the trigger!
