Cummins Engine Specs

Bore, stroke, displacement and compression for 5 Cummins engines across 3 families. Free reference with rod ratio and head specs where published.

At a glance

Displacement range	359-408 ci
Cylinder counts	6
Families	3
Engines	5

Engine families

• 5.9L 12V — 1 engine
• 5.9L 24V — 2 engines
• 6.7L ISB — 2 engines

Every engine page lists bore, stroke, displacement, compression and rod ratio, with mean piston speed and bore/stroke character worked out, plus cylinder head specs where published. Each links into the calculators with its own dimensions filled in.

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