Tennen-Gas [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], from Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Honda_C30A_engine_001.jpg
Nthefastlane Cropped & Added The Text "C-SERIES" Found Here

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Rich Niewiroski Jr. [CC BY 2.5 (https://creativecommons.org/licenses/by/2.5) or Attribution], via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:HondaS2000-003.jpg
Nthefastlane Cropped & Added The Text "F-SERIES" Found Here

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Hatsukari715 [Public domain], from Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Honda_J35A_VCM_Engine.JPG
Nthefastlane Cropped & Added The Text "J-SERIES" Found Here

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Hatsukari715 [Public domain], from Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Honda_K20A_Engine_01.JPG
Nthefastlane Cropped & Added The Text "K-SERIES" Found Here

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Boboiqbal [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Honda_City_Pakistan_L13A_i-VTEC_Engine_Dec2013.jpg
Nthefastlane Cropped & Added The Text "L-SERIES" Found Here

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Hatsukari715 [Public domain], from Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Honda_R18A_Engine.JPG
Nthefastlane Cropped & Added The Text "R-SERIES" Found Here