Cummins has provided three engines to Chrysler for use in their heavy duty Ram pickup line, the 5.9L 12v, the 5.9L 24v, and the 6.7L 24v. Though all three engines are based on the B series platform, their similarities vary considerably. Please enjoy this comparison between the engines that have been offered in Ram model pickups from 1989 to current. Bosch VE injection pump (89-93), Bosch P7100 injection pump (94-98). 24 valve (4v per cyl), solid lifter camshaft. 24 valve (4v per cyl), solid lifter camshaft. Electronically controlled Bosch VP44 injection pump, Bosch high pressure common rail system for 2003. 12 valve (2v per cyl), solid lifter camshaft. CumminsHub.com. All rights reserved. CumminsHub.com is not affiliated with nor endorsed by Cummins, FCA, or Ram Trucks.