OEM replacement timing chain for all Sea-Doo 1503 ROTAX 4-TEC 130/155/215/255/260, and 300 HP 1630 engines. Manufactured by IWIS. ---OEM ---Original ---High Quality ---Made in Germany For Sea-Doo 1503 ROTAX 4-TEC 130/155/215/255/260, and 300 HP 1630 engines.