As part of my track car build I will need to replace the rotors up front for sure and maybe the rears also. I wanted to go to a two piece rotor to help with any heat issues. After looking at the few options for the 135i I decided to look at Rock Auto as I have gotten really great deals over the years and if you have an account with them they send you closeout notifications that can save you tons of money.
Prices I found for two piece Brembo were around $402 shipping included.
Rock auto was $320.68 shipped to the door. Includes new screw to secure to hub
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