This application specific lines and fittings set for single OEM rear calipers taps into the OEM hardlines in the front left wheel well, after any sensors, ABS, OEM master, hydraulic pump etc. so the car that’s normally very sensitive about everything , has no idea these parts are installed. Highlighting this set is the double-F junction block that is one piece of CNC brass that bolts into OEM mounting points replacing the OEM black plastic bracket at the back of the front left wheel well. Our DF junction block takes the OEM hard lines feeding the rear brakes and merges them into our hand brake stainless steel braided inlet line at the back of the willwood master cylinder (inline type for single rear calipers, sold separately). The hydrobrake outlet (located on top of the HB-master) is cleanly routed into the right side of our junction block where the rear brake hardlines (running down the left rocker panel) feed the rear OEM calipers. Check out our YouTube build series, episode 21 to follow every step of the install.