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Peterbilt 390 With Supercharged Cummins under load. LOUD!
1950 Peterbilt 390 Supercharged 275 Cummins
1950 Peterbilt 390 Iron Lung Cummins
Supercharged Cummins Diesel being demonstrated under load.
Drag racing a 57 Peterbilt with a 300 supercharged cummins!
old peterbilt with supercharged cummins 2
Straight piped 275 supercharged cummins working under load
Supercharged Cummins Peterbilt
Ride in a 1957 Peterbilt with 300 supercharged cummins & backdrop manifold
Supercharged Cummins 275 iron lung engine
1950 Peterbilt with 275 Cummins
275 Supercharged cummins jake brake!
