MORRISON & HECKER L.L.P.
                                ATTORNEYS AT LAW

                                2600 Grand Avenue
                                  Kansas City,
                               Missouri 64108-4606
                                 Telephone (816)
                                    691-2600
                             Telefax (816) 474-4208


                                 April 17, 1998


Kinder Morgan Energy Partners, L.P.
1301 McKinney Street, Suite 3450
Houston, Texas 77010

      Re:  Form  S-3 Registration Statement

Ladies and Gentlemen:

     We have acted as counsel to Kinder Morgan Energy Partners, L.P., a Delaware
limited  partnership  (the  "Partnership"),  and Kinder  Morgan  G.P.,  Inc.,  a
Delaware corporation and the general partner of the Partnership (the "KM General
Partner"),  in connection with the preparation of the Registration  Statement on
Form  S-3,  as  amended,   (Registration  No.   333-25995)  (the   "Registration
Statement")  filed with the Securities and Exchange  Commission  pursuant to the
Securities Act of 1933 (the "Act").  The  Registration  Statement  covers Common
Units ("Common Units") representing limited partner interests in the Partnership
to be sold by First  Union  Investors,  Inc.,  First Union  Corporation  ("First
Union"), subsidiaries of First Union and/or Kinder Morgan G.P., Inc.

      In rendering the opinions set forth below,  we have examined and relied on
the following:  (1) the Registration Statement and the attached Prospectus;  (2)
the Partnership's  Second Amended and Restated Agreement of Limited  Partnership
dated January 14, 1998; and (3) such other documents, materials, and authorities
as we have deemed  necessary  in order to enable us to render our  opinions  set
forth below.

      In addition,  our opinions  are based on the facts and  circumstances  set
forth in the Prospectus and on certain  representations made by the Partnership,
the KM  General  Partner  and  the  Selling  Unitholders.  We have  not  made an
independent investigation of such facts. Our opinion as to the matters set forth
herein could change as a result of changes in facts and  circumstances,  changes
in the terms of the documents  reviewed by us, or changes in the law  subsequent
to the date hereof.

      Our opinion is based on the  provisions  of the  Internal  Revenue Code of
1986, as amended (the "Code"),  regulations under such Code,  judicial authority
and  current  administrative  rulings and  practice,  all as of the date of this
letter, and all of which may change at any time.




Kinder Morgan Energy Partners, L.P.
April 17, 1998
Page 2


      Based upon and subject to the foregoing and assuming  compliance  with all
provisions of the  documents  referenced  above,  we are of the opinion that for
federal income tax purposes (i) the Partnership  and its operating  partnerships
are and will continue to be classified as  partnerships  and not as associations
taxable as  corporations;  and (ii) each  purchaser of Common Units who acquires
beneficial  ownership of the  Partnership's  Common  Units,  and either has been
admitted or is pending  admission to the  Partnership  as an additional  limited
partner, or if the Common Units are held by a nominee,  such purchaser of Common
Units will be treated as a partner of the  Partnership  for  federal  income tax
purposes.

      Further,  we are of the opinion that the  discussion of federal income tax
consequences  set forth in the Prospectus  under the heading  "Material  Federal
Income Tax Considerations" is accurate in all material respects as to matters of
law and legal
conclusions.

      This opinion may be relied upon by you, the purchasers of Common Units and
the  Partnership.  We hereby consent to the filing of this opinion as an Exhibit
to the  Registration  Statement  and to all  references  to this firm  under the
headings "Material Federal Income Tax Considerations" and "Legal Matters" in the
Prospectus forming part of the Registration Statement. This consent is not to be
construed as an admission  that we are a person whose  consent is required to be
filed with the Registration Statement under the provisions of the Act.


                               Very truly yours,

                               /s/ MORRISON & HECKER L.L.P.