SR20DE Jun Auto One Piece Lightweight Chromoly Flywheel. Fits Nissan 200SX, NX2000, G20, SENTRA. Nissan Sentra Primera B13 B14. Only 4.8kg/10.56lbs. Made in Japan. 2001M-N014 Less rotational mass allows your engine to rev up quicker and get through your power band quicker! Great for street and track use. Performance clutches also available. Special Order from Japan.