M3 Master Cylinder

[PeaveyBassist]

What does it take to use the m3 master cylinder? I know the 25mm one from the 750's work but some people say they make the pedal too stiff. The m3 one is 23mm and realoem makes it look like the fittings are the same size for the brake lines. M10's. What all does it take to use the m3 master cylinder on a late model 325i? 1991 325i 5 spd

Will

[rs4pro3]

http://e30m3performance.com/installs/installs-1/25mc/25mc.htm

The fitting are not the same, you basically have to do the oposite of that article

[PeaveyBassist]

Thanks man. So basically I would need to change the brake line that goes from the MC to the ABS pump?

Will

[rs4pro3]

Yep, You should be able to order the M3 one at the dealer for not much money.

[PeaveyBassist]

I work at a shop so we get parts from the dealer for cheap.
This is it right?
M3 mc
M3 front brake line from mc -> abs pump

Will

[rs4pro3]

yep.

[GaryE30]

Bringing back an old thread regarding the M3 Master Cylinder. I'm trying to put one in my 325is with e30 m3 5-lug parts and brakes. I was going to see if I could buy the line that differs from the non-m e30 with the p/n - 34 51 2 225 867. I can't find this at BMA, BavAuto, KO, and Pelican is down for me right now.

Has anyone ever done this modification not using oem parts and what fittings did you use. I've got a brake line flaring tool, so If worst comes to worst I could just a new line, get m10 and m12 fittings then flare the ends respectively.

[atomic]

Why not just use the e32 750 25mm master instead? It is 2mm larger than the e30 m3 one and no other modifying needed... (providing you have ABS if not a simple t fitting is all that is needed)

[GaryE30]

Why not just use the e32 750 25mm master instead? It is 2mm larger than the e30 m3 one and no other modifying needed... (providing you have ABS if not a simple t fitting is all that is needed)

b/c I got this for free with the suspension swap. If someone wants to trade me a 25mm for the e30 m3 then I'd be down.