Evolution of succesfull 899 clutch code 21503. According to feadback from circuits, where 899 motor managent allows adjustable engine brake, we optimalize ramps angle to 45° to compare 40°on 21503 set.
This allows correct engine backtorque with using electronic engine brake. Both version will stay in production. Designed for STD clutch plates and springs. Produced from hard anodized 7075 with steel spring posts.