Case in point is this ’13 Ram 2500 Mega Cab owned by Jeff Kelderman of Kelderman Air Suspension Systems. ... The ’13 6.7L Cummins is rated at 370 hp and 800 lb-ft of torque from the factory.

Kelderman moved into the RV field when Gary saw a direct need for a specific innovation. Jeff tells the story of his father becoming excited when Dodge announced the Cummins Turbo Diesel engine ...

'95 3500 Ram SLT Ext Cab Dually, cummins' 5.9 diesel, 5 speed manual. SLT was the top of the line in '95, we added Kelderman Air Suspension for towing. It has performed on every tasked we have ...