I am looking at getting an LMM. I want to have a stainless 5inch straight pipe with a 6inch tip. Does anyone have any suggestions of what is a good brand? Im thinking MBRP. What is the best way to go? I relize that having a straight pipe I will be deleting the DPF. Any suggestions on what a good tuner is? I dont have to have EFI Live to make this work do I?