Cummins 4BT and 4 ISB Diesel Engine Conversions

Cummins 4BT and 4 ISB Diesel Engine Conversions

The Cummins R2.8L turbo-diesel crate engine conversion has a strong following. For many, however, this swap is too costly. Some find the Cummins 4BT and 4 ISB 3.9L conversion more affordable. Cummins built the 4BT engine for industrial, agricultural and commercial automotive use. Introduced in 1984, the Cummins B-Series engines included the 6BT 5.9L inline […]