R-4 Full Race Compound. Designed specifically for heavy-duty motorsports. The carbon based semi-metallic R-4 materials allow the pad to absorb tremendous amounts of heat and dissipate it at very even rate. Carbon Kevlar material warms up to race temperature quickly, which is quite helpful during restarts, and when track time is limited. When used with cast iron and steel alloy rotors, the R-4 compound requires minimal bed-in period. Throughout the entire heat range, the carbon kevlar material will give extremely consistent modulation and predictably. This is truly the most rotor friendly racing brake pad material ever. Good for road courses, oval track, rally, vintage racing, autocross, club events or professional racing events.
BRIAN'S APPLICATION NOTES: This is the MOST aggressive pad you can actually leave on the car between events. It still needs to heat to work and you are in danger of rolling through that first stop sign of the morning but at least these generally don't scream like Hawk Blues or similar race pads if you leave them on the car between track events.