Ford F-350 Super Duty Dessel, Bullet Proof! Flatbed Dully, low miles and solid truck. Just having it bulletproof was 11k BulletProof Diesel developed a fix for this by replacing the factory oil cooler with an external unit and updating the EGR cooler internals. The company's parts carry CARB EO certification and have been used by law enforcement agencies, ambulance companies, fire departments, and utility companies, along with private owners all across the United States and around the world. In addition to replacing the oil and EGR coolers, most 6.0L Power Stroke owners also replace the head gaskets either out of necessity or preventatively. They'll also upgrade from the factory head bolts to high-strength studs, and either clean the factory turbo vanes, which can easily become stuck, or replace the turbo with drop-in unit such as the Garrett PowerMax. And, should it tickle your fancy, BulletProof Diesel also offers a billet water pump and upgraded fuel injection control module (FICM) for the 6.0L Power Stroke. The fine folks at BulletProof Diesel define 6.0L Power Stroke as being "bulletproofed" when it has at least four of the five main problem areas addressed. These five areas are: Oil cooler, EGR cooler, head studs, fuel injection control module (FICM), and water pump.