19x18 model is the one you want. Make sure you get the correct banjo bolt for it. Thread pitch is different and make sure you get the one for double or single line(s) depending on what your application is now. Easy to install and bleading then is 10x faster. The only thing that you may have problems with is the tube from the res. to the master. The OD is different if you use the stock res. Go to a hardware store and pick up some tubing and wire tie or hose clamp it at each end.