News & Advices Novelties Flexion of C4 Mustang HT fins Novelties Flexion of C4 Mustang HT fins August 4, 2016 Innovative, super reactive and with a uniform flexion; the C4 Mustang HT in the version 30 are also quite rigid. Follow Us28,997FansLike5,409FollowersFollow2,270SubscribersSubscribe Instagram