Yoosung Enterprise Co., Ltd.

Company Profile




22, Asanvalleydong-ro, Dunpo-myeon, Asan-si, Chungcheongnam-do, Korea

Business Overview

-A specialized manufacturer of engine parts such as piston rings, cylinder liners, camshafts, etc.

-The Company supplies OEM piston rings for Chrysler's global Engine.

-The Company is estimated to have approximately a 60-70% share of the market in piston rings and cylinder liners in Korea, based on the volume of OEM sales to Korean automakers.


(As of Dec. 31, 2014)
Major shareholders Investment
Ratio (%)
Ryu, Si Young 20.11
Ryu, Si Hoon 5.58
Total 25.69


Piston rings
Cylinder liners
Spiny liners
Valve guides
Valve sheets
Air compressors


Aug. 1959 The Company was established.
Mar. 1960 The company name was changed to Yoosung Enterprise Co., Ltd.
Dec. 1984 Established Dongsuh Industrial Co., Ltd. jointly with T&N of the U.K. (T&N is currently Federal Mogul of the U.S.)
Oct. 1988 Went public.
Jan. 1989 Established Dongsung Metal Co., Ltd. jointly with Daido Metal Corporation of Japan.
Jul. 1992 Established its R&D center.
Feb. 1993 Established Yoosung P.M. Industrial Co., Ltd.
Feb. 1995 Formed a technical alliance with Hitchiner of the U.S.
Apr. 1995 Established Shinhwa Precision Co., Ltd. jointly with Nittan Valve Co., Ltd.
Jul. 1997 Formed a technical alliance with T&N of the U.K. and Teikoku Piston Ring Co., Ltd. of Japan.
Jan. 2003 Established Y&T Power Tech., Inc.jointly with Teikoku Piston Ring Co., Ltd. of Japan.
May. 2003 Opened a logistics center in Giheung, Korea.
Feb. 2005 Established China United Piston Ring Co.,Ltd. in Hebei Province, China, jointly with Teikoku Piston Ring Co., Ltd. of Japan and Anqing Huanxin Group of China.
Sep. 2005 Selected as a supplier of Chrysler of the U.S.
Apr. 2007 The plant of China United Piston Ring Co.,Ltd. (CUPR) was completed.

Supplemental Information 1

Note: A figure in brackets ( ) indicates a loss