525e Booster and Master cyl into E30

[WerkdE30]

I can get a booster and master cylinder very cheap the owner claims it will fit into an E30 is this worth doing? anyone done it?

[jmc330i]

The 525e (E28) brake servo (booster) is the same as the E30 servo, so thats not really worth changing unless yours is knackered.

The E28 Master Cylinder is a 23.81mm one (same size as E30 M3) which is bigger than the normal E30 M/C (21mm ish??) so it would give you a frimer pedal.
You can fit a bigger 25mm M/C from an E32 750i (a common upgrade for M3 owners) so maybe the E28 one will also fit the E30.

It might be worth a try if its that cheap, but you would need to check the thread size on the M/C for the pipes. If both are 10mm threads then it should fit.
Also if the holes for the brake pipes are in different places compared to the E30 M/C then you would also need to mod the brake pipes to fit - this may not need doing as the 750i M/C is a straight swap in a non-M3 E30 so again maybe the E28 one will be.

[Brianmoooore]

To achieve what?