Upgrading Brake booster for S13 3lines to 2lines

[curtains]

Ok so I got a new 180sx with GTR brakes on it, but its still got the factory 3 line/pipe brakes and CA18DE brake booster which don't work, or doesn't have enough preasure,

I was thinking of getting the GTR BM50 brake booster to go with my GTR brakes, the thing is the BM50 is only 2 line brakes, how do I connect my 3 lines/pipes to the 2 line/pipe BM50, even the BM44's are 2 lines/pipe.

[lazysk8er2]

the most common used are the boosters from either an automatic 240sx (us spec) or z32 (gtr and z32 brakes are quite similar)

[KiLLeR2001]

You have to insert your own fitting into the BMC. Either by cutting one out from your old cylinder or buying one new from somewhere.... or you could try to convert your entire car to ABS lolol