Quote:
Originally Posted by driftkae
Hi everyone!
I've been a follower of the forum since 2015 and i've finally picked up first BRZ (ZC6) ten years later.. 
I need some help in identifying the brake setup being used, according to the previous owner, he retrofitted the STI brembos from the Subaru impreza STI (GRB) aka hatchback. I understand the PCD for the STIs are usually 5 x 114.3
Front are 4-piston calipers while the rears are 2.
The front rotors used are dual PCD, but the rears are the 5x100 pattern.
I am looking into swapping the already worn pads and rotors to slotted dixcels and perhaps S-type pads - could anyone guide me on the correct part numbers to order? perhaps via RHDjapan etc. I've reached out to dixcel's support as well and I would like to know has anyone tried this setup before.
I also understand the need to consider the internal diameter of the rear rotor due the brake shoe sizing.
Front brakes:
[IMG]  [/IMG]
[IMG]  [/IMG]
The shim has since been flipped according to the direction of rotation:
[IMG]  [/IMG]
Rear brakes:
[IMG]  [/IMG]
Here's also a picture of my current setup, looking forward for more interactions!
[IMG]  [/IMG]
> also, how cautious do i need to be when removing and reinstalling the calipers? I've heard horror stories of the aluminium threads stripping due to repeated heat cycles.  |
I unfortunately don't have a definite answer, but these cars did have the option to come with Brembos from the factory. Having owned both an STi and a BRZ with Brembos, I'll say that visually there is no noticable difference and pads are definitely interchangable.
I do know the piston sizes are slightly different in the front calipers, but I *think* the overall caliper size is the same.
I'd personally look up specs for OEM replacement parts for the STi Brembos and the BRZ performance pack Brembos and compare. I'd bet they are the same.
As for removing them... that can definitely be a thing. Unfortunately there isn't much to be done and there isn't really a good way to be "careful" about it. It's kinda a "it'll break or it won't, but you gotta try to remove it anyways" sort of situation.
I will say that removing the bolts with an impact gun seems superior to removing with hand tools. Hand tools are more likely to slowly stretch the bolt and snap it whereas the sudden hit from an impact gun gives a better chance for success.
If the bolt does break, it's pretty straightforward and simple to helicoil the brakes and get back in action. It's a bit scary to do (definitely don't want to tap it at an angle or something), but as a first-timer with minimal experience with such things I had no problem doing it well.
I've had two STi's and a BRZ with Brembos. All 3 cars needed at least one caliper helicoiled eventually.