EBC grooved series brake shoes are radius ground and edge trimmed to fit precisely in your brake drum and also feature lead in and lead out chamfers at lining ends and original equipment style brake shoe springs. The multiple angled liner grooves are designed to channel away dirt, dust,water and debris from the braking area to improve braking and extend shoe and drum life. EBC grooved Brake Shoes H319G For Rear: Honda: 1981 CR 450 RB IMPORTANT: Picture is for indication purpose only. To visually check the kit, you can visit EBC website. The bought kit will match your motorcycle.