Cummins

Cummins Inc. is a manufacturer of diesel and natural gas engines for buses and trucks. Their corporate headquarters is located in Columbus, Ohio. Cummins makes engines for many modern bus models including the LFS, D40LF, and the Orion VII.

Cummins Westport
In 2001, Cummins and Westport Innovations formed a 50/50 joint venture to further develope and distribute alternative fueled engines.

Diesel

 * Cummins ISB
 * Cummins ISC
 * Cummins ISL
 * Cummins ISM

Natural Gas

 * Cummins Westport B Gas Plus
 * Cummins Westport C Gas Plus
 * Cummins Westport ISL G

Propane

 * Cummins B LPG Plus

Diesel

 * Cummins VTB-903
 * Cummins B5.9
 * Cummins C8.3
 * Cummins L10
 * Cummins M11

Natural Gas

 * Cummins L10G
 * Cummins C8.3G
 * Cummins B5.9G
 * Cummins B5.9LPG
 * Cummins Westport C Gas Plus (discontinued in North America only)
 * Cummins Westport L Gas Plus