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Message: <blockquote data-quote="Raffaelli" data-source="post: 926051" data-attributes="member: 12402">I work on 7.3's, 6.0's and 6.4 every day. The 7.3 is a great engine. Only problem now is most have 200K plus miles on them. AND they generally cost more to buy than a newer 6.0. Only thing that wears out on them are high pressure oil pumps and cam sensors. They have weak transmissions though. Feel free to put a tune in your diesel. It wont hurt anything. Stage 4 is usually safe for a stock truck. Dont put an aftermarket intake on it. Diesels need clean air, and a K&N will wear the engine out fast.  I make the shop ALOT of money working on 6.0's. EGR coolers, injectors, FICMs, oil pumps, EGR valves, head gaskets. But a chipped 6.0 is like nothing else ive ever driven. You cannot afford to drive a 6.4. They are beast to work on. Need to pull the cab to do anything.</blockquote>