Hey, guys. I apologize if the text is not very clear, I am from Russia and I am writing to you through a translator. I drive a Chevy Silverado 3500hd 2008 Duramax 6.6 + Allison 1000. Modification of the LMM engine. In addition to the elevator and wheels, the car is completely standard, with a mileage of 110,000 miles. How reliable is this engine and transmission? What problems can we expect from this machine in the future? I have factory installed EGR and DPF on my car, do I need to remove them or can I leave them in the car? Thank you all in advance!