EBC Sintered SR21 Pads Overview EBC Sintered SR Pads Are In A Class Of Their Own; Made In The USA Plant Of EBC Brakes. The SR21 Bites Harder And Lasts Longer Than Any Other Option Without Damaging Rotors. While There Have Been A Few Sintered Pads Around In The Past; None Compare To These. Utilizing Advanced Transfer Film Technology; Disc Wear Is Almost Totally Eliminated. Being A Pad In Compressibility Terms Means That Pedal Feel Is Also Improved; Providing Better And More Responsive Braking. The Wear Life Of The SR21 Pads Is Exceptional, With Tests Showing A Lifespan That Is 3-5 Times Longer Than Competitor Semi-Metallic Pads