====== MR Ninja ======
MR stands for Mugen Racing. The MR Ninja engines were made in the [[grpgandini|GRP Gandini]] factory along with Mario Rossi. These were made for Mugen Seiki and utilized the MR Ninja branding and were distributed by Mugen Seiki.

  * Early 2005 the Gandini brothers partnered with Mario Rossi to start production of engines for Mugen Seiki and others.
  * January 28th, 2008  Mugen Seiki announces a new [[ninjajx|Ninja JX]] line in partnership with OS Engines.
  * February 1st, 2008 [[grpgandini|GRP Gandini]] announces that it has ceased production of MR NINJA engines for Mugen Seiki. 
===== Information =====

^Variant ^ Notes 
| Type | Private |  
| Parent Company | Mugen Seiki |
| Founded | 2006 |
| Divisions | MR Ninja |
| Headquarters | Funabashi, Chiba, Japan |
| Status | Inactive |
| Website | [[http://www.ninja-engines.com|Click]] |

===== Small Block Engines =====
==== Surface ====
  * [[mr12t01a|MR NINJA MR12 T01A]] - MR NINJA MR12 T01A
  * [[mr12t01t|MR NINJA MR12 T01T]] - MR NINJA MR12 T01 Tuned
===== Big Block Engines =====
==== Surface ====
  * [[mr21b01|MR NINJA MR21 B01]] - MR NINJA MR21 B01
  * [[mr21b01a|MR NINJA MR21 B01A]] - MR NINJA MR21 B01A
  * [[mr21b01t|MR NINJA MR21 B01T]] - MR NINJA MR21 B01 Tuned
  * [[mr21r01|MR NINJA MR21 R01]] - MR NINJA MR21 R01
  * [[mr21r01a|MR NINJA MR21 R01A]] - MR NINJA MR21 R01A
  * [[mr21r01t|MR NINJA MR21 R01T]] - MR NINJA MR21 R01 Tuned
  * [[mr28m01a|MR NINJA MR28 M01A]] - MR NINJA MR28 M01A