We have had excellent luck with Endless RF-650 brake fluid in our racing and time attack endeavors. It not only gives great boiling performance but is the least compressible fluid on the market giving a noticeably firmer pedal. RF-650 is finding its way into many high-end professional Motorsports nowadays like F-1, Indy Cars, IMSA, and NASCAR. If it’s good enough for these, it’s good enough for our GT-R.
First, we disconnected the ABS sensors lines and brackets holding the brake lines and sensor lines and got them out of the way.
Next, we disconnected and plugged the brake lines, you do not want to risk getting air into the ABS pump, it is a bitch to get back out by bleeding! The DBA R35 has special stiff brake lines to improve the pedal feel from the factory so we did not go with braided steel lines.