in reply to the rear M10 x 30mm bolts for the rear, I found there was ALOT of washers needed to make this bolt fit. As the original bolt from the factory rear caliper was half the size, I couldnt see how 30mm was required when it looked like 18mm was only needed.
Pic below to show the difference
But apart from that, very simple job to do and the car stops so much better! A definite must do mod!
Hi RicKii
I'm doing my rears today and when prepping/test fitting, I also found the bolts too long.
I bought 30mm based on someone else's post, however I think 20-25mm would be the correct length (with 1 washer). I ended up using an angle grinder to cut down the bolt approximately 5mm.
Note: I wouldn't use the standard bolt length as a guide as the Brembo caliper attachment points are thicker and if you use a washer as I did 18mm is way too short.
Can't wait to finish this mod, its been quite a mission! Had issues with seized hard/rubber brake line joining nut...