Hallelujah, praise the Lord!
Ok, background story.
Several years back I decided to venture into project of upgrading brakes on BMW. To be exact, installing Brembo calipers from newer 3 series from 335/340 model, and rear from E82 135i.
E90 330/328 had high performance brake option that involved 6 pot Brembo calipers and 2 pot Brembo calipers in the back, same as those on 135. The problem was that 6 pot in front retained A LOT of heat, and ceramic pistons would crack on track. So popular replacement were 4 pot from newer 3 series (same knuckle). Rear from newer 3 series required too much “monkey business,” so did not want that.
Ok. Got calipers, installed M3 master cylinder, coded ECU to SPBR (performance setting to adjust brake force between axles for performance brakes). Really didn’t need upgrade, because original ones were good on track. But, had an itch just to try.
Well, the problem were rear rotors. Finding rear rotors with 185mm brake shoes (165mm on 135) was really hard. BMW was selling for $200 a piece, drilled and slotted only. That is how originals came. Zimmerman was selling replacement $175 a piece, also drilled and slotted. DFC had dimpled and slotted for $65 and I swallowed my pride that I always run plain rotors, and bought them. I had bad experience with DFC when their track pads caught fire on track once, but gave it a try. Which meant, I had to get dimpled and slotted in front, bcs. it would just look weird (got Zimmerman, $80 a piece 340X30mm).
Few nights ago I am on Rock Auto checking if there are any rear rotors that are plain, and lo and behold, Zimmerman has plain rotors that fit 185mm shoes. $70 a piece, two left!
They arrived today, look high quality like Zimmerman always does, BUT, Made in Germany. Something you don’t see every day.
Now, I can get front plain too when it is time to change pads.