0001193125-14-427300 Sample Contracts

FORM OF SENIOR INDENTURE MPLX LP, as Issuer, and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee INDENTURE Dated as of Debt Securities

Indenture • November 26th, 2014 • MPLX Lp • Pipe lines (no natural gas) • New York

• Contract Type
  Indenture
• Filed
  November 26th, 2014
• Company
  MPLX Lp
• Industry
  Pipe lines (no natural gas)
• Jurisdiction
  New York

THIS INDENTURE dated as of is between MPLX LP, a Delaware limited partnership (the “Partnership”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as trustee (the “Trustee”).

FORM OF SUBORDINATED INDENTURE MPLX LP, as Issuer, and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee INDENTURE Dated as of Debt Securities

Subordinated Indenture • November 26th, 2014 • MPLX Lp • Pipe lines (no natural gas) • New York

• Contract Type
  Subordinated Indenture
• Filed
  November 26th, 2014
• Company
  MPLX Lp
• Industry
  Pipe lines (no natural gas)
• Jurisdiction
  New York

THIS INDENTURE dated as of [ ] is between MPLX LP, a Delaware limited partnership (the “Partnership”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as trustee (the “Trustee”).