Endless SS-Y Sport pads set the initial grip at a higher performance level. Mu, the coefficient of friction, changes with temperature so the engineers designed this compound to react quickly at low temperatures while still having the ability to fend off fade and recover quickly. The SS-Y compound pad allows you to take advantage of its high performance without leg-press force on the brake pedal. Developed for lots of repeated braking, this compound uses a special resin material creating a soft compound that is strong and resistant against high temperatures. Endless also recommends that this pad be used for closed-course drag race situations.