Technical advances in diesel engines and drivelines.

I bought an 01 to avoid the issue. It is great and with my resonator is even more powerful and spooks up the turbo faster. My buddy changed his 01 450 hp to a 500. Needed a new turbo and head to gang it on but it runs great. No way you could do this in the emission control engines. They are not more reliable and with def now they run hotter and as a result the builders need a bigger engine coolant package too.