I just installed Carbon Lorraine (CL) XBK5 brake pads on my 2013 F4. They are a sintered pad, like most high performance pads. The pads give me the easy to modulate initial bite that I've been looking for. The original Brembo pads and the EBC HH's that I have tried, all have a heavy initial bite that compresses the forks and unsettles the ride. I've only ridden my F4 on the street so I can't say how the CL XBK5 pads will work on the track. But for the street, stopping at stop lights, braking into corners, their very linear braking force is great.