RR Racing BBK review

madmantwo

New member
Hey everyone, I've seen some speculation about this kit in different threads and thought I'd post up my first impressions. I had a seized caliper in the front and rear and thought I'd replace everything just for good measure. Here is what I installed on my 2006 V6 Limited:

Front:

  • RR Racing Front BBK
    • No brake lines
    • Black w/ Wilwood logo
    • DBA 4000 front rotors
    • No rear rotors, pads

Rear:

  • Centric 120.44128 rotors (4th gen)
  • Centric 142.44587 right caliper (5th gen)
  • Centric 142.44588 left caliper (5th gen)
  • Akebono ASP606 performance ceramic pads

The rear components were bought on RockAuto. The rear left caliper had its bleeder screw hole machined off-center, so the tapered end of the screw was not seating properly and leaked. I filed a warranty claim online, ordered a new one immediately, and sent the bad one back with my core returns. Love doing business with them.

For brake lines, I bought the Crown performance SS brake lines w/ 2" extension because I have a 2" lift...in hindsight the extensions weren't really necessary though. The kit includes the front brake lines and the rear upper brake lines. For the remaining two lower rear brake lines I bought the Stoptech rear kit and I used ATE Type 200 DOT4 brake fluid.

Here is a picture of the BBK (don't worry I cleaned the rotors off):

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Installation was very simple, bolted right up. I did have to trim my dust shields slightly with a dremel to fit the caliper brackets but overall it was quite painless. RR Racing provides instructions for bedding the brakes, and braking performance definitely improved after the bedding procedure. There are bleeders on the top and bottom, but I believe you only need to use the top one (this is done to make them universal L/R). Be careful when tightening the bleeder screws too because they are very small and can strip easily if you're not careful.

I feel the nose dive a bit more than before under hard braking, and that is probably to be expected when you change the F/R bias this far from stock. The brake overhaul combined with SS lines definitely gives a nice firm pedal feel and braking is 10x better than my stock setup, though keep in mind two of my calipers were seized. Overall my 4Runner feels much safer, especially when unleashing the supercharger :roll:

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Let me know if you have any more questions!
 
Last edited:
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Awesome to see someone try this kit, and happy that you like it. I'll be going with this next time my brakes seize up. As far as BBK's go, this one is definitely in the more affordable range, no means cheap, but well worth it for a BBK.
 
Were there any part #s for the DBA rotors? Want to confirm my suspicions that RR uses 5th-gen specs rotors.

What size wheels are you running? I emailed them if they have a template to check caliper-to-wheel clearance (I'm running 5th-gen 17's),they said it should clear.

Rotrex supercharger?
 
Were there any part #s for the DBA rotors? Want to confirm my suspicions that RR uses 5th-gen specs rotors.

What size wheels are you running? I emailed them if they have a template to check caliper-to-wheel clearance (I'm running 5th-gen 17's),they said it should clear.

Rotrex supercharger?

Ah, I should have kept the boxes. I am 99% sure they are 5th-gen spec rotors; on their website they say 32mm rotor thickness which matches the 31.8mm thickness of OEM 5th gen rotors.

I am running 17" rims too, yours should be fine.

Yep, Rotrex C30-94 and intercooler came with the truck when I bought it along with some other pieces from the URD mk1 FJ cruiser kit but the shop had really half-assed the install. I pieced together an ABS plastic intake, bolted in the biggest heat exchanger that would easily fit, upgraded fuel pump/injectors, and installed the UCON EMS with a tune from Gadget.
 
Awesome looking setup! Just curious, though, why you chose to go with 5th gen rear rotors? In some previous threads on the 5th gen swap, it was concluded that it’s better to use the 5th gen calipers with 4th gen rotors because the hub bore doesn’t fit correctly with the 5th gen version. Also, I can’t remember, but I thought there was a different bore for the emergency brake as well, but not positive on that one.
 
Awesome looking setup! Just curious, though, why you chose to go with 5th gen rear rotors? In some previous threads on the 5th gen swap, it was concluded that it’s better to use the 5th gen calipers with 4th gen rotors because the hub bore doesn’t fit correctly with the 5th gen version. Also, I can’t remember, but I thought there was a different bore for the emergency brake as well, but not positive on that one.

Whoops, good catch... The rotors I listed are actually 4th gen rotors for the very reasons you mentioned. I'll fix that
 
Awesome looking setup! Just curious, though, why you chose to go with 5th gen rear rotors? In some previous threads on the 5th gen swap, it was concluded that it’s better to use the 5th gen calipers with 4th gen rotors because the hub bore doesn’t fit correctly with the 5th gen version. Also, I can’t remember, but I thought there was a different bore for the emergency brake as well, but not positive on that one.

I run 5th gen rotors with 5th gen calipers. No issues at all, and yes, my e-brake works.
 

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