Yes it is. In fact it is interchangeable with several machines.
MacBook Pro 15" Unibody (Early 2011-Mid 2012) Heat Sink
Models Model Numbers Options
MacBook Pro 15.4" 2.0GHz Core i7 (A1286) - Early 2011 MC721LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.2GHz Core i7 (A1286) - Early 2011 MC723LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.2GHz Core i7 (A1286) - Late 2011 MD318LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.3GHz Core i7 (A1286) - Early 2011 MC723LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.4GHz Core i7 (A1286) - Late 2011 MD322LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.53GHz Core 2 Duo (A1286) - Mid 2009 MC118LL/A 661-5223 (2.53GHz Mid 2009)
MacBook Pro 15.4" 2.5GHz Core i7 (A1286) - Late 2011 MD322LL/A 922-9753 (Early 2011)
MacBook Pro 15.4" 2.66GHz Core 2 Duo (A1286) - Mid 2009 MB985LL/A 661-5218
MacBook Pro 15.4" 2.8GHz Core 2 Duo (A1286) - Mid 2009 MB986LL/A 661-5218
MacBook Pro 15.4" 3.06GHz Core 2 Duo (A1286) - Mid 2009 MB986LL/A 661-5218