Exhibit 21.1

American Axle & Manufacturing Holdings, Inc.	Delaware	n/a
American Axle & Manufacturing, Inc.	Delaware	100	%
Colfor Manufacturing, Inc.	Delaware	100	%
MSP Industries Corporation	Michigan	100	%
AccuGear, Inc.	Delaware	100	%
Oxford Forge, Inc.	Delaware	100	%
Auburn Hills Manufacturing, Inc.	Delaware	100	%
AAM Travel Services, LLC	Michigan	100	%
Rochester Manufacturing, LLC	Indiana	100	%
Diversified Mfg & Assembly LLC	Michigan	49	%
AAM International Holdings, Inc.	Delaware	100	%
AAM Comércio e Participações Ltda.	Brazil	92.57	%
AAM do Brasil Ltda.	Brazil	90.76	%
Changshu AAM Automotive Driveline High Technology Manufacturing Co. Ltd.	China	100	%
American Axle & Manufacturing Korea, Inc.	Korea	100	%
AAM India Manufacturing Corporation Private Limited	India	99.92	%
AAM Poland Sp. z o. o.	Poland	100	%
Albion Automotive (Holdings) Ltd	Scotland	100	%
Albion Automotive Limited	Scotland	100	%
AAM Germany GmbH	Germany	100	%
American Axle & Manufacturing (Thailand) Co., Ltd.	Thailand	99.99	%
Hefei AAM Automotive Driveline & Chassis System Co., Ltd.	China	50	%
AAM Luxembourg S.à r.l.	Luxembourg	100	%
AAM International S.à r.l.	Luxembourg	100	%
e-AAM Driveline Systems AB	Sweden	100	%
AAM Investment Management (Shanghai) Co. Ltd.	China	100	%
AAM Commercial & Trading (Shanghai) Co., Ltd.	China	100	%
USM Mexico Manufacturing, LLC	Delaware	100	%
USM Holdings, LLC II	Michigan	100	%
USM Holdings, LLC	Michigan	100	%
AAM Maquiladora Mexico, S. de R.L. de C.V.	Mexico	93.29	%
AAM Mexico Holdings LLC	Delaware	100	%
American Axle & Manufacturing de Mexico Holdings S. de R.L. de C.V.	Mexico	99.99	%
American Axle & Manufacturing de Mexico S. de R.L. de C.V.	Mexico	99.99	%
Metaldyne Performance Group, Inc.	Delaware	100	%
MPG Holdco I Inc.	Delaware	100	%
ASP Grede Intermediate Holdings LLC	Delaware	100	%
ASP Grede AcquisitionCo LLC	Delaware	100	%
GSC RIII - Grede LLC	Delaware	100	%
Grede Holdings LLC	Delaware	82.30	%
Grede II LLC	Delaware	100	%
Grede Machining LLC	Delaware	100	%

Citation Lost Foam Patterns, LLC	Delaware	100	%
Grede Wisconsin Subsidiaries LLC	Wisconsin	100	%
Grede Omaha LLC	Delaware	100	%
Grede Radford LLC	Delaware	100	%
Citation Camden Casting Center LLC	Tennessee	100	%
Skokie Casting, LLC	Illinois	100	%
Novocast, S. de R. L. de C.V.	Mexico	89.20	%
Transformaciones Especializadas NC, S.A. de C.V.	Mexico	99.99	%
Brillion Iron Works, Inc.	Delaware	100	%
Grede LLC	Delaware	100	%
Novogredetek Holdings, S. de R.L. de C.V.	Mexico	96.8	%
Shop IV Subsidiary Investment (Grede), LLC	Delaware	100	%
ASP MD Holdings, Inc.	Delaware	100	%
ASP MD Intermediate Holdings, Inc.	Delaware	100	%
ASP MD Intermediate Holdings II, Inc.	Delaware	100	%
MD Investors Corporation	Delaware	100	%
Metaldyne LLC	Delaware	100	%
Metaldyne SinterForged Products, LLC	Delaware	100	%
Metaldyne BSM, LLC	Delaware	100	%
Metaldyne Sintered Ridgway, LLC	Delaware	100	%
Metaldyne M&A Bluffton, LLC	Delaware	100	%
Metaldyne Powertrain Components, Inc.	Delaware	100	%
Gear Design and Manufacturing, LLC	Delaware	100	%
Punchcraft Machining and Tooling, LLC	Delaware	100	%
Metaldyne Tubular Components, LLC	Delaware	100	%
Metaldyne Japan Corporation	Japan	100	%
MetaldyneLux S.à.r.l.	Luxembourg	100	%
MetaldyneLux Holding S.à.r.l.	Luxembourg	100	%
Metaldyne Europe S.à.r.l..	Luxembourg	99.99	%
Metaldyne Engine Holdings, S.L.U.	Spain	100	%
Metaldyne International Spain, S.L.U.	Spain	100	%
Metaldyne Sintered Components España, S.L.U.	Spain	100	%
Metaldyne International France SAS	France	100	%
Metaldyne GmbH	Germany	100	%
H+B Hyprotec Technologie Verwaltungs GmbH	Germany	100	%
Metaldyne Zell Verwaltungs GmbH	Germany	100	%
Metaldyne International (UK) Ltd.	United Kingdom	100	%
Metaldyne International Deutschland GmbH	Germany	100	%
Metaldyne Nürnberg GmbH	Germany	100	%
Metaldyne Oslavany, spol. s.r.o.	Czech Republic	100	%
Metaldyne Grundstücks GbR	Germany	94.90	%

Metaldyne Componentes Automotivos do Brasil Ltda.	Brazil	99.99	%
Metaldyne Netherlands Sintered Holdings B.V.	Netherlands	100	%
Metaldyne Powertrain Mexico, S. de R.L. de C.V.	Mexico	99.99	%
MPG Mexico, S. de R.L. de C.V.	Mexico	99.97	%
Metaldyne Sintered Components Services S. de R.L. de C.V.	Mexico	99.99	%
Metaldyne Sintered Components Mexico, S. de R.L. de C.V.	Mexico	99.97	%
Metaldyne Drivetrain Mexico, S. de R.L. de C.V.	Mexico	99.99	%
Metaldyne Forged Products, S. de R.L. de C.V.	Mexico	99.99	%
Holzer Limited	United Kingdom	100	%
Metaldyne Korea Limited	Korea	100	%
Metaldyne Hong Kong Limited	Hong Kong	100	%
Metaldyne Mauritius Limited	Mauritius	100	%
Metaldyne Industries Limited	India	51	%
Metaldyne (Suzhou) Automotive Components Co., Ltd	China	100	%
ASP HHI Holdings Inc.	Delaware	100	%
ASP HHI Intermediate Holdings Inc.	Delaware	100	%
ASP HHI Intermediate Holdings II, Inc.	Delaware	100	%
ASP HHI Acquisition Co., Inc.	Delaware	100	%
HHI Holdings, LLC	Delaware	100	%
Bearing Holdings LLC	Delaware	100	%
Kyklos Holdings LLC	Delaware	100	%
Kyklos Bearing International, LLC	Delaware	100	%
Forging Holdings LLC	Delaware	100	%
Hephaestus Holdings LLC	Delaware	100	%
HHI FormTech Holdings, LLC	Delaware	100	%
HHI FormTech, LLC	Delaware	100	%
HHI Forging, LLC	Delaware	100	%
Jernberg Holdings LLC	Delaware	100	%
Jernberg Industries, LLC	Delaware	100	%
Impact Forge Holdings, LLC	Delaware	100	%
Impact Forge Group, LLC	Delaware	100	%
HHI Funding II LLC	Delaware	100	%
Gearing Holdings LLC	Delaware	100	%
Cloyes Gear Holdings, LLC	Delaware	100	%
Cloyes Gear and Products, Inc.	Ohio	100	%
The Mesh Company, LLC.	Arkansas	100	%
HDM Products, Inc.	Delaware	100	%
Cloyes Acquisition Company	Delaware	100	%
Cloyes Dynagear Mexicana S. de R.L. de C.V.	Mexico	80	%
Huzhou Mapleland Precision Forge Co., Ltd.	China	25	%