This is the master cylinder we use when doing a rear disc brake job in the shop. This master is specifically set up for Land Cruisers, Mini Trucks and 4Runners with 4 wheel disc brake systems. It bolts directly to your booster and works as normal. Very minor hard line bending may be necessarry. This is the best way to get the bias set correctly. This is master cylinder is 4Runner with 4 w/abs and T100 master. It is new for great results.