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| Well I think you are over complicating the switch back to Tier 4 to T3 as all the differences that changed T2 to T3 are in the T4 like : High pressure common rail fuel system, Advance ECU, Better Turbocharger, internal engine modifications, and EGR. The T4 have DPF and DEF added to the system and most likely a different ECU eliminating these will not be that hard when you start with a bare engine. It is a lot different then deleting them from a T4 engine that has been running the field or on the roads. | |
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