By Featured Writer: Mike McGlothlin It’s durable, reliable, provides unmatched low rpm torque, and can double a vehicle’s fuel economy. No wonder the 4BT Cummins has become one of the premier diesel engines for swap projects. Perhaps no other group of enthusiasts has taken to the industrial strength 3.9L Cummins quite like Jeep Wrangler owners.…
Read moreWhat’s Required to Outfit Your Jeep Wrangler With A 4BT Cummins







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